1957201325690 has 16 divisors (see below), whose sum is σ = 3793959493128. Its totient is φ = 722658950976.

The previous prime is 1957201325671. The next prime is 1957201325749. The reversal of 1957201325690 is 965231027591.

It can be written as a sum of positive squares in 4 ways, for example, as 1254509762401 + 702691563289 = 1120049^2 + 838267^2 .

It is a super-2 number, since 2×1957201325690² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7527697277 + ... + 7527697536.

Almost surely, 2^{1957201325690} is an apocalyptic number.

1957201325690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1957201325690 is a deficient number, since it is larger than the sum of its proper divisors (1836758167438).

1957201325690 is a wasteful number, since it uses less digits than its factorization.

1957201325690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15055394833.

The product of its (nonzero) digits is 1020600, while the sum is 50.

The spelling of 1957201325690 in words is "one trillion, nine hundred fifty-seven billion, two hundred one million, three hundred twenty-five thousand, six hundred ninety".