256450147631 has 8 divisors (see below), whose sum is σ = 266775346800. Its totient is φ = 246223754560.

The previous prime is 256450147619. The next prime is 256450147663. The reversal of 256450147631 is 136741054652.

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 256450147631 - 2¹⁰ = 256450146607 is a prime.

It is a super-2 number, since 2×256450147631² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256450147601) 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, 24696230 + ... + 24706611.

It is an arithmetic number, because the mean of its divisors is an integer number (33346918350).

Almost surely, 2^256450147631 is an apocalyptic number.

256450147631 is a deficient number, since it is larger than the sum of its proper divisors (10325199169).

256450147631 is a wasteful number, since it uses less digits than its factorization.

256450147631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49403049.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 256450147631 in words is "two hundred fifty-six billion, four hundred fifty million, one hundred forty-seven thousand, six hundred thirty-one".