165374446215440 has 80 divisors (see below), whose sum is σ = 479371122034560. Its totient is φ = 51545281935360.

The previous prime is 165374446215437. The next prime is 165374446215523. The reversal of 165374446215440 is 44512644473561.

165374446215440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×165374446215440² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13423244345 + ... + 13423256664.

It is an arithmetic number, because the mean of its divisors is an integer number (5992139025432).

Almost surely, 2^{165374446215440} is an apocalyptic number.

165374446215440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165374446215440 is an abundant number, since it is smaller than the sum of its proper divisors (313996675819120).

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

165374446215440 is a wasteful number, since it uses less digits than its factorization.

165374446215440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26846501040 (or 26846501034 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 56.

The spelling of 165374446215440 in words is "one hundred sixty-five trillion, three hundred seventy-four billion, four hundred forty-six million, two hundred fifteen thousand, four hundred forty".