257118078886 has 4 divisors (see below), whose sum is σ = 385677118332. Its totient is φ = 128559039442.

The previous prime is 257118078883. The next prime is 257118078947. The reversal of 257118078886 is 688870811752.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×257118078886² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257118078883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64279519720 + ... + 64279519723.

It is an arithmetic number, because the mean of its divisors is an integer number (96419279583).

Almost surely, 2^257118078886 is an apocalyptic number.

257118078886 is a deficient number, since it is larger than the sum of its proper divisors (128559039446).

257118078886 is a wasteful number, since it uses less digits than its factorization.

257118078886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128559039445.

The product of its (nonzero) digits is 12042240, while the sum is 61.

The spelling of 257118078886 in words is "two hundred fifty-seven billion, one hundred eighteen million, seventy-eight thousand, eight hundred eighty-six".