1957640325 has 24 divisors (see below), whose sum is σ = 3315579456. Its totient is φ = 1018608000.

The previous prime is 1957640309. The next prime is 1957640339. The reversal of 1957640325 is 5230467591.

1957640325 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1957640325 - 2⁴ = 1957640309 is a prime.

It is a super-2 number, since 2×1957640325² = 7664711284132211250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 315241 + ... + 321390.

It is an arithmetic number, because the mean of its divisors is an integer number (138149144).

Almost surely, 2^1957640325 is an apocalyptic number.

1957640325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1957640325 is a deficient number, since it is larger than the sum of its proper divisors (1357939131).

1957640325 is a wasteful number, since it uses less digits than its factorization.

1957640325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636685 (or 636680 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 1957640325 is about 44245.2294038578. The cubic root of 1957640325 is about 1250.9625279750.

The spelling of 1957640325 in words is "one billion, nine hundred fifty-seven million, six hundred forty thousand, three hundred twenty-five".