256513832542 has 16 divisors (see below), whose sum is σ = 419758038000. Its totient is φ = 116594938240.

The previous prime is 256513832489. The next prime is 256513832563. The reversal of 256513832542 is 245238315652.

256513832542 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 256513832492 and 256513832501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1684584 + ... + 1830532.

It is an arithmetic number, because the mean of its divisors is an integer number (26234877375).

Almost surely, 2^256513832542 is an apocalyptic number.

256513832542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

256513832542 is a deficient number, since it is larger than the sum of its proper divisors (163244205458).

256513832542 is a wasteful number, since it uses less digits than its factorization.

256513832542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225851.

The product of its digits is 1728000, while the sum is 46.

The spelling of 256513832542 in words is "two hundred fifty-six billion, five hundred thirteen million, eight hundred thirty-two thousand, five hundred forty-two".