257478060402 has 12 divisors (see below), whose sum is σ = 557869130910. Its totient is φ = 85826020128.

The previous prime is 257478060401. The next prime is 257478060409. The reversal of 257478060402 is 204060874752.

It is a happy number.

257478060402 is a `hidden beast` number, since 2 + 574 + 78 + 0 + 6 + 0 + 4 + 0 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 253934358561 + 3543701841 = 503919^2 + 59529^2 .

It is not an unprimeable number, because it can be changed into a prime (257478060401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7152168327 + ... + 7152168362.

Almost surely, 2^257478060402 is an apocalyptic number.

257478060402 is an abundant number, since it is smaller than the sum of its proper divisors (300391070508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257478060402 is a wasteful number, since it uses less digits than its factorization.

257478060402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14304336697 (or 14304336694 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 257478060402 in words is "two hundred fifty-seven billion, four hundred seventy-eight million, sixty thousand, four hundred two".