972138865598 has 4 divisors (see below), whose sum is σ = 1458208298400. Its totient is φ = 486069432798.

The previous prime is 972138865561. The next prime is 972138865603. The reversal of 972138865598 is 895568831279.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243034716398 + ... + 243034716401.

It is an arithmetic number, because the mean of its divisors is an integer number (364552074600).

Almost surely, 2^972138865598 is an apocalyptic number.

972138865598 is a deficient number, since it is larger than the sum of its proper divisors (486069432802).

972138865598 is a wasteful number, since it uses less digits than its factorization.

972138865598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486069432801.

The product of its digits is 261273600, while the sum is 71.

The spelling of 972138865598 in words is "nine hundred seventy-two billion, one hundred thirty-eight million, eight hundred sixty-five thousand, five hundred ninety-eight".