97687488920180 has 48 divisors (see below), whose sum is σ = 210158990188560. Its totient is φ = 38119813939200.

The previous prime is 97687488920179. The next prime is 97687488920209. The reversal of 97687488920180 is 8102988478679.

It can be written as a sum of positive squares in 8 ways, for example, as 27717676798564 + 69969812121616 = 5264758^2 + 8364796^2 .

It is a super-2 number, since 2×97687488920180² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (77) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11371436 + ... + 18019004.

It is an arithmetic number, because the mean of its divisors is an integer number (4378312295595).

Almost surely, 2^{97687488920180} is an apocalyptic number.

It is an amenable number.

97687488920180 is an abundant number, since it is smaller than the sum of its proper divisors (112471501268380).

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

97687488920180 is a wasteful number, since it uses less digits than its factorization.

97687488920180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6665540 (or 6665538 counting only the distinct ones).

The product of its (nonzero) digits is 780337152, while the sum is 77.

The spelling of 97687488920180 in words is "ninety-seven trillion, six hundred eighty-seven billion, four hundred eighty-eight million, nine hundred twenty thousand, one hundred eighty".