161502040636 has 24 divisors (see below), whose sum is σ = 292390056000. Its totient is φ = 77962323264.

The previous prime is 161502040613. The next prime is 161502040643. The reversal of 161502040636 is 636040205161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4277730 + ... + 4315318.

It is an arithmetic number, because the mean of its divisors is an integer number (12182919000).

Almost surely, 2^161502040636 is an apocalyptic number.

It is an amenable number.

161502040636 is a deficient number, since it is larger than the sum of its proper divisors (130888015364).

161502040636 is a wasteful number, since it uses less digits than its factorization.

161502040636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74661 (or 74659 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

Adding to 161502040636 its reverse (636040205161), we get a palindrome (797542245797).

The spelling of 161502040636 in words is "one hundred sixty-one billion, five hundred two million, forty thousand, six hundred thirty-six".