68515804956 has 48 divisors (see below), whose sum is σ = 175111403040. Its totient is φ = 20753940480.

The previous prime is 68515804949. The next prime is 68515804999. The reversal of 68515804956 is 65940851586.

It is a junction number, because it is equal to n+sod(n) for n = 68515804896 and 68515804905.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5784805 + ... + 5796636.

It is an arithmetic number, because the mean of its divisors is an integer number (3648154230).

Almost surely, 2^68515804956 is an apocalyptic number.

It is an amenable number.

68515804956 is an abundant number, since it is smaller than the sum of its proper divisors (106595598084).

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

68515804956 is a wasteful number, since it uses less digits than its factorization.

68515804956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11581494 (or 11581492 counting only the distinct ones).

The product of its (nonzero) digits is 10368000, while the sum is 57.

The spelling of 68515804956 in words is "sixty-eight billion, five hundred fifteen million, eight hundred four thousand, nine hundred fifty-six".