1957197865904 has 20 divisors (see below), whose sum is σ = 3795685836600. Its totient is φ = 977666037120.

The previous prime is 1957197865897. The next prime is 1957197865969. The reversal of 1957197865904 is 4095687917591.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58288682 + ... + 58322249.

It is an arithmetic number, because the mean of its divisors is an integer number (189784291830).

Almost surely, 2^{1957197865904} is an apocalyptic number.

It is an amenable number.

1957197865904 is a deficient number, since it is larger than the sum of its proper divisors (1838487970696).

1957197865904 is a wasteful number, since it uses less digits than its factorization.

1957197865904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116611988 (or 116611982 counting only the distinct ones).

The product of its (nonzero) digits is 171460800, while the sum is 71.

The spelling of 1957197865904 in words is "one trillion, nine hundred fifty-seven billion, one hundred ninety-seven million, eight hundred sixty-five thousand, nine hundred four".