1918468698192 has 60 divisors (see below), whose sum is σ = 5369752826100. Its totient is φ = 639405594624.

The previous prime is 1918468698191. The next prime is 1918468698197. The reversal of 1918468698192 is 2918968648191.

1918468698192 is a `hidden beast` number, since 1 + 9 + 18 + 468 + 69 + 8 + 1 + 92 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 761458683456 + 1157010014736 = 872616^2 + 1075644^2 .

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1918468698192.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918468698191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 230578 + ... + 1972334.

It is an arithmetic number, because the mean of its divisors is an integer number (89495880435).

Almost surely, 2^{1918468698192} is an apocalyptic number.

1918468698192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1918468698192 is an abundant number, since it is smaller than the sum of its proper divisors (3451284127908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1918468698192 is a wasteful number, since it uses less digits than its factorization.

1918468698192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749420 (or 1749411 counting only the distinct ones).

The product of its digits is 107495424, while the sum is 72.

The spelling of 1918468698192 in words is "one trillion, nine hundred eighteen billion, four hundred sixty-eight million, six hundred ninety-eight thousand, one hundred ninety-two".