257454964881 has 6 divisors (see below), whose sum is σ = 371879393730. Its totient is φ = 171636643248.

The previous prime is 257454964853. The next prime is 257454964913. The reversal of 257454964881 is 188469454752.

It is a happy number.

257454964881 is a `hidden beast` number, since 2 + 5 + 7 + 4 + 549 + 6 + 4 + 8 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 251593531281 + 5861433600 = 501591^2 + 76560^2 .

It is not a de Polignac number, because 257454964881 - 2¹⁵ = 257454932113 is a prime.

It is a super-2 number, since 2×257454964881² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257454965881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14303053596 + ... + 14303053613.

It is an arithmetic number, because the mean of its divisors is an integer number (61979898955).

Almost surely, 2^257454964881 is an apocalyptic number.

It is an amenable number.

257454964881 is a deficient number, since it is larger than the sum of its proper divisors (114424428849).

257454964881 is a wasteful number, since it uses less digits than its factorization.

257454964881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28606107215 (or 28606107212 counting only the distinct ones).

The product of its digits is 77414400, while the sum is 63.

The spelling of 257454964881 in words is "two hundred fifty-seven billion, four hundred fifty-four million, nine hundred sixty-four thousand, eight hundred eighty-one".