426626187257 has 8 divisors (see below), whose sum is σ = 431291694216. Its totient is φ = 421983165312.

The previous prime is 426626187227. The next prime is 426626187271. The reversal of 426626187257 is 752781626624.

It can be written as a sum of positive squares in 4 ways, for example, as 17869272976 + 408756914281 = 133676^2 + 639341^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 426626187257 - 2¹⁶ = 426626121721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426626187217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5583098 + ... + 5658995.

It is an arithmetic number, because the mean of its divisors is an integer number (53911461777).

Almost surely, 2^426626187257 is an apocalyptic number.

It is an amenable number.

426626187257 is a deficient number, since it is larger than the sum of its proper divisors (4665506959).

426626187257 is a wasteful number, since it uses less digits than its factorization.

426626187257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11242507.

The product of its digits is 13547520, while the sum is 56.

The spelling of 426626187257 in words is "four hundred twenty-six billion, six hundred twenty-six million, one hundred eighty-seven thousand, two hundred fifty-seven".