257390157890707 has 8 divisors (see below), whose sum is σ = 260348126799600. Its totient is φ = 254433654418944.

The previous prime is 257390157890669. The next prime is 257390157890729. The reversal of 257390157890707 is 707098751093752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257390157890707 - 2¹⁵ = 257390157857939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257390157890737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366005982 + ... + 366708547.

It is an arithmetic number, because the mean of its divisors is an integer number (32543515849950).

Almost surely, 2^{257390157890707} is an apocalyptic number.

257390157890707 is a deficient number, since it is larger than the sum of its proper divisors (2957968908893).

257390157890707 is an equidigital number, since it uses as much as digits as its factorization.

257390157890707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732718565.

The product of its (nonzero) digits is 233377200, while the sum is 70.

The spelling of 257390157890707 in words is "two hundred fifty-seven trillion, three hundred ninety billion, one hundred fifty-seven million, eight hundred ninety thousand, seven hundred seven".