165140392554 has 24 divisors (see below), whose sum is σ = 357828290820. Its totient is φ = 55043088768.

The previous prime is 165140392553. The next prime is 165140392559. The reversal of 165140392554 is 455293041561.

It is a happy number.

165140392554 is a `hidden beast` number, since 1 + 6 + 5 + 1 + 4 + 0 + 3 + 92 + 554 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 157032290529 + 8108102025 = 396273^2 + 90045^2 .

It is not an unprimeable number, because it can be changed into a prime (165140392553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27549 + ... + 575360.

Almost surely, 2^165140392554 is an apocalyptic number.

165140392554 is an abundant number, since it is smaller than the sum of its proper divisors (192687898266).

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

165140392554 is a wasteful number, since it uses less digits than its factorization.

165140392554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618134 (or 618131 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 165140392554 in words is "one hundred sixty-five billion, one hundred forty million, three hundred ninety-two thousand, five hundred fifty-four".