897657879951 has 48 divisors (see below), whose sum is σ = 1590508954944. Its totient is φ = 476160602112.

The previous prime is 897657879947. The next prime is 897657879997. The reversal of 897657879951 is 159978756798.

It is not a de Polignac number, because 897657879951 - 2² = 897657879947 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897657879931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5662566 + ... + 5818931.

It is an arithmetic number, because the mean of its divisors is an integer number (33135603228).

Almost surely, 2^897657879951 is an apocalyptic number.

897657879951 is a deficient number, since it is larger than the sum of its proper divisors (692851074993).

897657879951 is a wasteful number, since it uses less digits than its factorization.

897657879951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11481600 (or 11481597 counting only the distinct ones).

The product of its digits is 2400451200, while the sum is 81.

The spelling of 897657879951 in words is "eight hundred ninety-seven billion, six hundred fifty-seven million, eight hundred seventy-nine thousand, nine hundred fifty-one".