165831538494 has 32 divisors (see below), whose sum is σ = 351356654880. Its totient is φ = 51998323712.

The previous prime is 165831538373. The next prime is 165831538513. The reversal of 165831538494 is 494835138561.

It is a congruent number.

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, 229809 + ... + 620060.

It is an arithmetic number, because the mean of its divisors is an integer number (10979895465).

Almost surely, 2^165831538494 is an apocalyptic number.

165831538494 is an abundant number, since it is smaller than the sum of its proper divisors (185525116386).

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

165831538494 is a wasteful number, since it uses less digits than its factorization.

165831538494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851804.

The product of its digits is 12441600, while the sum is 57.

The spelling of 165831538494 in words is "one hundred sixty-five billion, eight hundred thirty-one million, five hundred thirty-eight thousand, four hundred ninety-four".