256631143127746 has 16 divisors (see below), whose sum is σ = 386583374347200. Its totient is φ = 127770526076688.

The previous prime is 256631143127743. The next prime is 256631143127797. The reversal of 256631143127746 is 647721341136652.

It is not an unprimeable number, because it can be changed into a prime (256631143127743) 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, 125920860 + ... + 127942663.

It is an arithmetic number, because the mean of its divisors is an integer number (24161460896700).

Almost surely, 2^{256631143127746} is an apocalyptic number.

256631143127746 is a deficient number, since it is larger than the sum of its proper divisors (129952231219454).

256631143127746 is a wasteful number, since it uses less digits than its factorization.

256631143127746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253865673.

The product of its digits is 30481920, while the sum is 58.

The spelling of 256631143127746 in words is "two hundred fifty-six trillion, six hundred thirty-one billion, one hundred forty-three million, one hundred twenty-seven thousand, seven hundred forty-six".