10256815620 has 96 divisors (see below), whose sum is σ = 32939504640. Its totient is φ = 2646915840.

The previous prime is 10256815609. The next prime is 10256815631. The reversal of 10256815620 is 2651865201.

10256815620 is a `hidden beast` number, since 1 + 0 + 25 + 6 + 8 + 1 + 5 + 620 = 666.

It is an interprime number because it is at equal distance from previous prime (10256815609) and next prime (10256815631).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 289617 + ... + 323096.

It is an arithmetic number, because the mean of its divisors is an integer number (343119840).

Almost surely, 2^10256815620 is an apocalyptic number.

10256815620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10256815620 is an abundant number, since it is smaller than the sum of its proper divisors (22682689020).

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

10256815620 is a wasteful number, since it uses less digits than its factorization.

10256815620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612762 (or 612754 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

It can be divided in two parts, 1025681 and 5620, that added together give a palindrome (1031301).

The spelling of 10256815620 in words is "ten billion, two hundred fifty-six million, eight hundred fifteen thousand, six hundred twenty".