97639493679 has 48 divisors (see below), whose sum is σ = 173613271104. Its totient is φ = 51492672000.

The previous prime is 97639493669. The next prime is 97639493681.

97639493679 is a `hidden beast` number, since 9 + 7 + 63 + 9 + 493 + 6 + 79 = 666.

97639493679 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 97639493679 - 2¹⁵ = 97639460911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97639493669) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8102899 + ... + 8114939.

It is an arithmetic number, because the mean of its divisors is an integer number (3616943148).

Almost surely, 2^97639493679 is an apocalyptic number.

97639493679 is a deficient number, since it is larger than the sum of its proper divisors (75973777425).

97639493679 is a wasteful number, since it uses less digits than its factorization.

97639493679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21968 (or 21965 counting only the distinct ones).

The product of its digits is 416649744, while the sum is 72.

The spelling of 97639493679 in words is "ninety-seven billion, six hundred thirty-nine million, four hundred ninety-three thousand, six hundred seventy-nine".