165537145072 has 40 divisors (see below), whose sum is σ = 345442046544. Its totient is φ = 76392374784.

The previous prime is 165537144991. The next prime is 165537145079. The reversal of 165537145072 is 270541735561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165537145079) 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, 1819908 + ... + 1908700.

Almost surely, 2^165537145072 is an apocalyptic number.

It is an amenable number.

165537145072 is an abundant number, since it is smaller than the sum of its proper divisors (179904901472).

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

165537145072 is a wasteful number, since it uses less digits than its factorization.

165537145072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97777 (or 97771 counting only the distinct ones).

The product of its (nonzero) digits is 882000, while the sum is 46.

The spelling of 165537145072 in words is "one hundred sixty-five billion, five hundred thirty-seven million, one hundred forty-five thousand, seventy-two".