165797469540 has 120 divisors (see below), whose sum is σ = 520403792832. Its totient is φ = 44187923520.

The previous prime is 165797469529. The next prime is 165797469557. The reversal of 165797469540 is 45964797561.

165797469540 is a `hidden beast` number, since 1 + 6 + 579 + 7 + 4 + 6 + 9 + 54 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2964435 + ... + 3019845.

Almost surely, 2^165797469540 is an apocalyptic number.

165797469540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165797469540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260201896416).

165797469540 is an abundant number, since it is smaller than the sum of its proper divisors (354606323292).

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

165797469540 is a wasteful number, since it uses less digits than its factorization.

165797469540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57279 (or 57268 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 63.

The spelling of 165797469540 in words is "one hundred sixty-five billion, seven hundred ninety-seven million, four hundred sixty-nine thousand, five hundred forty".