97497555772 has 24 divisors (see below), whose sum is σ = 181398250656. Its totient is φ = 45749466048.

The previous prime is 97497555761. The next prime is 97497555773. The reversal of 97497555772 is 27755579479.

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 97497555698 and 97497555707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97497555773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9992823 + ... + 10002574.

It is an arithmetic number, because the mean of its divisors is an integer number (7558260444).

Almost surely, 2^97497555772 is an apocalyptic number.

97497555772 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

97497555772 is the 166903-rd centered heptagonal number.

It is an amenable number.

97497555772 is a deficient number, since it is larger than the sum of its proper divisors (83900694884).

97497555772 is a wasteful number, since it uses less digits than its factorization.

97497555772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19995477 (or 19995475 counting only the distinct ones).

The product of its digits is 194481000, while the sum is 67.

The spelling of 97497555772 in words is "ninety-seven billion, four hundred ninety-seven million, five hundred fifty-five thousand, seven hundred seventy-two".