1801851879492 has 120 divisors (see below), whose sum is σ = 5432699469120. Its totient is φ = 510091680960.

The previous prime is 1801851879491. The next prime is 1801851879547. The reversal of 1801851879492 is 2949781581081.

1801851879492 is a `hidden beast` number, since 1 + 8 + 0 + 1 + 8 + 518 + 79 + 49 + 2 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1801851879491) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3397134 + ... + 3891557.

It is an arithmetic number, because the mean of its divisors is an integer number (45272495576).

Almost surely, 2^{1801851879492} is an apocalyptic number.

1801851879492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1801851879492 is an abundant number, since it is smaller than the sum of its proper divisors (3630847589628).

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

1801851879492 is a wasteful number, since it uses less digits than its factorization.

1801851879492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7288823 (or 7288812 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 63.

The spelling of 1801851879492 in words is "one trillion, eight hundred one billion, eight hundred fifty-one million, eight hundred seventy-nine thousand, four hundred ninety-two".