256342012147 has 32 divisors (see below), whose sum is σ = 293284091520. Its totient is φ = 221955655680.

The previous prime is 256342012123. The next prime is 256342012151. The reversal of 256342012147 is 741210243652.

It is not a de Polignac number, because 256342012147 - 2²⁷ = 256207794419 is a prime.

It is a super-2 number, since 2×256342012147² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256342012117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109875393 + ... + 109877725.

It is an arithmetic number, because the mean of its divisors is an integer number (9165127860).

Almost surely, 2^256342012147 is an apocalyptic number.

256342012147 is a deficient number, since it is larger than the sum of its proper divisors (36942079373).

256342012147 is a wasteful number, since it uses less digits than its factorization.

256342012147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823.

The product of its (nonzero) digits is 80640, while the sum is 37.

Adding to 256342012147 its reverse (741210243652), we get a palindrome (997552255799).

The spelling of 256342012147 in words is "two hundred fifty-six billion, three hundred forty-two million, twelve thousand, one hundred forty-seven".