257112557777 has 8 divisors (see below), whose sum is σ = 270834220800. Its totient is φ = 243409837104.

The previous prime is 257112557773. The next prime is 257112557797. The reversal of 257112557777 is 777755211752.

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 257112557777 - 2² = 257112557773 is a prime.

It is a super-2 number, since 2×257112557777² (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 (257112557773) 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, 4707713 + ... + 4762014.

It is an arithmetic number, because the mean of its divisors is an integer number (33854277600).

Almost surely, 2^257112557777 is an apocalyptic number.

It is an amenable number.

257112557777 is a deficient number, since it is larger than the sum of its proper divisors (13721663023).

257112557777 is a wasteful number, since it uses less digits than its factorization.

257112557777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9471175.

The product of its digits is 8403500, while the sum is 56.

The spelling of 257112557777 in words is "two hundred fifty-seven billion, one hundred twelve million, five hundred fifty-seven thousand, seven hundred seventy-seven".