97761899520 has 132 divisors (see below), whose sum is σ = 338742595620. Its totient is φ = 26069827584.

The previous prime is 97761899483. The next prime is 97761899563. The reversal of 97761899520 is 2599816779.

97761899520 is a `hidden beast` number, since 9 + 7 + 7 + 6 + 18 + 99 + 520 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25456840704 + 72305058816 = 159552^2 + 268896^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1014705 + ... + 1106864.

It is an arithmetic number, because the mean of its divisors is an integer number (2566231785).

Almost surely, 2^97761899520 is an apocalyptic number.

97761899520 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

97761899520 is an abundant number, since it is smaller than the sum of its proper divisors (240980696100).

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

97761899520 is a wasteful number, since it uses less digits than its factorization.

97761899520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121600 (or 2121579 counting only the distinct ones).

The product of its (nonzero) digits is 17146080, while the sum is 63.

The spelling of 97761899520 in words is "ninety-seven billion, seven hundred sixty-one million, eight hundred ninety-nine thousand, five hundred twenty".