97776712656 has 160 divisors (see below), whose sum is σ = 322029388800. Its totient is φ = 27824688000.

The previous prime is 97776712651. The next prime is 97776712667. The reversal of 97776712656 is 65621767779.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 97776712593 and 97776712602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97776712651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 694615 + ... + 823433.

It is an arithmetic number, because the mean of its divisors is an integer number (2012683680).

Almost surely, 2^97776712656 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 97776712656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161014694400).

97776712656 is an abundant number, since it is smaller than the sum of its proper divisors (224252676144).

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

97776712656 is a wasteful number, since it uses less digits than its factorization.

97776712656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129094 (or 129082 counting only the distinct ones).

The product of its digits is 46675440, while the sum is 63.

The spelling of 97776712656 in words is "ninety-seven billion, seven hundred seventy-six million, seven hundred twelve thousand, six hundred fifty-six".