1957028312817 has 12 divisors (see below), whose sum is σ = 2831430131764. Its totient is φ = 1302557176800.

The previous prime is 1957028312797. The next prime is 1957028312861. The reversal of 1957028312817 is 7182138207591.

1957028312817 is a `hidden beast` number, since 1 + 9 + 570 + 2 + 8 + 31 + 28 + 17 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7427681856 + 1949600630961 = 86184^2 + 1396281^2 .

It is not a de Polignac number, because 1957028312817 - 2⁷ = 1957028312689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1957028312417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177357934 + ... + 177368967.

Almost surely, 2^{1957028312817} is an apocalyptic number.

It is an amenable number.

1957028312817 is a deficient number, since it is larger than the sum of its proper divisors (874401818947).

1957028312817 is a wasteful number, since it uses less digits than its factorization.

1957028312817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354727520 (or 354727517 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 54.

The spelling of 1957028312817 in words is "one trillion, nine hundred fifty-seven billion, twenty-eight million, three hundred twelve thousand, eight hundred seventeen".