971893257872 has 10 divisors (see below), whose sum is σ = 1883043187158. Its totient is φ = 485946628928.

The previous prime is 971893257859. The next prime is 971893257917. The reversal of 971893257872 is 278752398179.

It can be written as a sum of positive squares in only one way, i.e., 921745925776 + 50147332096 = 960076^2 + 223936^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30371664293 + ... + 30371664324.

Almost surely, 2^971893257872 is an apocalyptic number.

It is an amenable number.

971893257872 is a deficient number, since it is larger than the sum of its proper divisors (911149929286).

971893257872 is a wasteful number, since it uses less digits than its factorization.

971893257872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60743328625 (or 60743328619 counting only the distinct ones).

The product of its digits is 106686720, while the sum is 68.

The spelling of 971893257872 in words is "nine hundred seventy-one billion, eight hundred ninety-three million, two hundred fifty-seven thousand, eight hundred seventy-two".