971987915376 has 180 divisors, whose sum is σ = 3041730273400. Its totient is φ = 288887814144.

The previous prime is 971987915333. The next prime is 971987915387. The reversal of 971987915376 is 673519789179.

971987915376 is a `hidden beast` number, since 9 + 7 + 1 + 9 + 87 + 9 + 1 + 537 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 176070 + ... + 1405338.

Almost surely, 2^971987915376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 971987915376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1520865136700).

971987915376 is an abundant number, since it is smaller than the sum of its proper divisors (2069742358024).

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

971987915376 is a wasteful number, since it uses less digits than its factorization.

971987915376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229336 (or 1229310 counting only the distinct ones).

The product of its digits is 180033840, while the sum is 72.

The spelling of 971987915376 in words is "nine hundred seventy-one billion, nine hundred eighty-seven million, nine hundred fifteen thousand, three hundred seventy-six".