256933905546 has 32 divisors (see below), whose sum is σ = 545876020800. Its totient is φ = 80392642560.

The previous prime is 256933905541. The next prime is 256933905587. The reversal of 256933905546 is 645509339652.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (256933905541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10326135 + ... + 10350986.

It is an arithmetic number, because the mean of its divisors is an integer number (17058625650).

Almost surely, 2^256933905546 is an apocalyptic number.

256933905546 is an abundant number, since it is smaller than the sum of its proper divisors (288942115254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256933905546 is a wasteful number, since it uses less digits than its factorization.

256933905546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20677254.

The product of its (nonzero) digits is 26244000, while the sum is 57.

The spelling of 256933905546 in words is "two hundred fifty-six billion, nine hundred thirty-three million, nine hundred five thousand, five hundred forty-six".