257607630061 has 4 divisors (see below), whose sum is σ = 271165926400. Its totient is φ = 244049333724.

The previous prime is 257607630029. The next prime is 257607630079. The reversal of 257607630061 is 160036706752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 257607630061 - 2⁵ = 257607630029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257607630361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6779148141 + ... + 6779148178.

It is an arithmetic number, because the mean of its divisors is an integer number (67791481600).

Almost surely, 2^257607630061 is an apocalyptic number.

It is an amenable number.

257607630061 is a deficient number, since it is larger than the sum of its proper divisors (13558296339).

257607630061 is a wasteful number, since it uses less digits than its factorization.

257607630061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13558296338.

The product of its (nonzero) digits is 317520, while the sum is 43.

The spelling of 257607630061 in words is "two hundred fifty-seven billion, six hundred seven million, six hundred thirty thousand, sixty-one".