1916238880240 has 40 divisors (see below), whose sum is σ = 4490336171520. Its totient is φ = 760460150016.

The previous prime is 1916238880177. The next prime is 1916238880247. The reversal of 1916238880240 is 420888326191.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1916238880240² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916238880247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94292935 + ... + 94313254.

It is an arithmetic number, because the mean of its divisors is an integer number (112258404288).

Almost surely, 2^{1916238880240} is an apocalyptic number.

1916238880240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1916238880240 is an abundant number, since it is smaller than the sum of its proper divisors (2574097291280).

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

1916238880240 is a wasteful number, since it uses less digits than its factorization.

1916238880240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188606329 (or 188606323 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 52.

The spelling of 1916238880240 in words is "one trillion, nine hundred sixteen billion, two hundred thirty-eight million, eight hundred eighty thousand, two hundred forty".