257032780227 has 8 divisors (see below), whose sum is σ = 380789304080. Its totient is φ = 171355186800.

The previous prime is 257032780223. The next prime is 257032780237. The reversal of 257032780227 is 722087230752.

257032780227 is a `hidden beast` number, since 2 + 570 + 3 + 2 + 78 + 0 + 2 + 2 + 7 = 666.

It is not a de Polignac number, because 257032780227 - 2² = 257032780223 is a prime.

It is a super-2 number, since 2×257032780227² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257032780223) 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, 4759866274 + ... + 4759866327.

It is an arithmetic number, because the mean of its divisors is an integer number (47598663010).

Almost surely, 2^257032780227 is an apocalyptic number.

257032780227 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

257032780227 is a deficient number, since it is larger than the sum of its proper divisors (123756523853).

257032780227 is an equidigital number, since it uses as much as digits as its factorization.

257032780227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9519732610 (or 9519732604 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 45.

The spelling of 257032780227 in words is "two hundred fifty-seven billion, thirty-two million, seven hundred eighty thousand, two hundred twenty-seven".