257812756377 has 24 divisors (see below), whose sum is σ = 378096856032. Its totient is φ = 156144468480.

The previous prime is 257812756343. The next prime is 257812756381. The reversal of 257812756377 is 773657218752.

It is not a de Polignac number, because 257812756377 - 2²² = 257808562073 is a prime.

It is a super-2 number, since 2×257812756377² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 257812756377.

It is not an unprimeable number, because it can be changed into a prime (257812756387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 298873 + ... + 777785.

It is an arithmetic number, because the mean of its divisors is an integer number (15754035668).

Almost surely, 2^257812756377 is an apocalyptic number.

It is an amenable number.

257812756377 is a deficient number, since it is larger than the sum of its proper divisors (120284099655).

257812756377 is a wasteful number, since it uses less digits than its factorization.

257812756377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480421 (or 480410 counting only the distinct ones).

The product of its digits is 34574400, while the sum is 60.

The spelling of 257812756377 in words is "two hundred fifty-seven billion, eight hundred twelve million, seven hundred fifty-six thousand, three hundred seventy-seven".