256683315080502 has 32 divisors (see below), whose sum is σ = 570409544417760. Its totient is φ = 85560778391040.

The previous prime is 256683315080389. The next prime is 256683315080503. The reversal of 256683315080502 is 205080513386652.

It is a happy number.

256683315080502 is a `hidden beast` number, since 2 + 5 + 6 + 6 + 8 + 3 + 3 + 1 + 50 + 80 + 502 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256683315080503) 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, 5415118 + ... + 23295710.

It is an arithmetic number, because the mean of its divisors is an integer number (17825298263055).

Almost surely, 2^{256683315080502} is an apocalyptic number.

256683315080502 is an abundant number, since it is smaller than the sum of its proper divisors (313726229337258).

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

256683315080502 is a wasteful number, since it uses less digits than its factorization.

256683315080502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18146445 (or 18146439 counting only the distinct ones).

The product of its (nonzero) digits is 10368000, while the sum is 54.

The spelling of 256683315080502 in words is "two hundred fifty-six trillion, six hundred eighty-three billion, three hundred fifteen million, eighty thousand, five hundred two".