97687488920178 has 16 divisors (see below), whose sum is σ = 197271822286656. Its totient is φ = 32246355565680.

The previous prime is 97687488920143. The next prime is 97687488920179. The reversal of 97687488920178 is 87102988478679.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 97687488920178.

It is not an unprimeable number, because it can be changed into a prime (97687488920179) 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, 79035184593 + ... + 79035185828.

It is an arithmetic number, because the mean of its divisors is an integer number (12329488892916).

Almost surely, 2^{97687488920178} is an apocalyptic number.

97687488920178 is an abundant number, since it is smaller than the sum of its proper divisors (99584333366478).

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

97687488920178 is a wasteful number, since it uses less digits than its factorization.

97687488920178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158070370529.

The product of its (nonzero) digits is 5462360064, while the sum is 84.

The spelling of 97687488920178 in words is "ninety-seven trillion, six hundred eighty-seven billion, four hundred eighty-eight million, nine hundred twenty thousand, one hundred seventy-eight".