257527420426 has 4 divisors (see below), whose sum is σ = 386291130642. Its totient is φ = 128763710212.

The previous prime is 257527420417. The next prime is 257527420471. The reversal of 257527420426 is 624024725752.

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

It can be written as a sum of positive squares in only one way, i.e., 257429390625 + 98029801 = 507375^2 + 9901^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64381855105 + ... + 64381855108.

Almost surely, 2^257527420426 is an apocalyptic number.

257527420426 is a deficient number, since it is larger than the sum of its proper divisors (128763710216).

257527420426 is a wasteful number, since it uses less digits than its factorization.

257527420426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128763710215.

The product of its (nonzero) digits is 1881600, while the sum is 46.

The spelling of 257527420426 in words is "two hundred fifty-seven billion, five hundred twenty-seven million, four hundred twenty thousand, four hundred twenty-six".