256622401514631 has 4 divisors (see below), whose sum is σ = 342163202019512. Its totient is φ = 171081601009752.

The previous prime is 256622401514627. The next prime is 256622401514651. The reversal of 256622401514631 is 136415104226652.

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

It is not a de Polignac number, because 256622401514631 - 2² = 256622401514627 is a prime.

It is a super-4 number, since 4×256622401514631⁴ (a number of 59 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256622401514651) 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, 42770400252436 + ... + 42770400252441.

It is an arithmetic number, because the mean of its divisors is an integer number (85540800504878).

Almost surely, 2^{256622401514631} is an apocalyptic number.

256622401514631 is a deficient number, since it is larger than the sum of its proper divisors (85540800504881).

256622401514631 is an equidigital number, since it uses as much as digits as its factorization.

256622401514631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85540800504880.

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 256622401514631 in words is "two hundred fifty-six trillion, six hundred twenty-two billion, four hundred one million, five hundred fourteen thousand, six hundred thirty-one".