97925638866 has 32 divisors (see below), whose sum is σ = 226223938368. Its totient is φ = 27928880640.

The previous prime is 97925638859. The next prime is 97925638873. The reversal of 97925638866 is 66883652979.

It is an interprime number because it is at equal distance from previous prime (97925638859) and next prime (97925638873).

It is a self number, because there is not a number n which added to its sum of digits gives 97925638866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43637755 + ... + 43639998.

It is an arithmetic number, because the mean of its divisors is an integer number (7069498074).

Almost surely, 2^97925638866 is an apocalyptic number.

97925638866 is an abundant number, since it is smaller than the sum of its proper divisors (128298299502).

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

97925638866 is a wasteful number, since it uses less digits than its factorization.

97925638866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87277786.

The product of its digits is 235146240, while the sum is 69.

The spelling of 97925638866 in words is "ninety-seven billion, nine hundred twenty-five million, six hundred thirty-eight thousand, eight hundred sixty-six".