157764632431987 has 12 divisors (see below), whose sum is σ = 191501346200976. Its totient is φ = 129347400502320.

The previous prime is 157764632431951. The next prime is 157764632431999. The reversal of 157764632431987 is 789134236467751.

It is not a de Polignac number, because 157764632431987 - 2⁷ = 157764632431859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157764632431387) 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, 69993180964 + ... + 69993183217.

It is an arithmetic number, because the mean of its divisors is an integer number (15958445516748).

Almost surely, 2^{157764632431987} is an apocalyptic number.

157764632431987 is a deficient number, since it is larger than the sum of its proper divisors (33736713768989).

157764632431987 is a wasteful number, since it uses less digits than its factorization.

157764632431987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139986364218 (or 139986364211 counting only the distinct ones).

The product of its digits is 1280240640, while the sum is 73.

The spelling of 157764632431987 in words is "one hundred fifty-seven trillion, seven hundred sixty-four billion, six hundred thirty-two million, four hundred thirty-one thousand, nine hundred eighty-seven".