68268508251 has 32 divisors (see below), whose sum is σ = 96892443648. Its totient is φ = 42607488000.

The previous prime is 68268508219. The next prime is 68268508267. The reversal of 68268508251 is 15280586286.

It is not a de Polignac number, because 68268508251 - 2⁵ = 68268508219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 68268508194 and 68268508203.

It is not an unprimeable number, because it can be changed into a prime (68268508211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9747751 + ... + 9754751.

It is an arithmetic number, because the mean of its divisors is an integer number (3027888864).

Almost surely, 2^68268508251 is an apocalyptic number.

68268508251 is a deficient number, since it is larger than the sum of its proper divisors (28623935397).

68268508251 is a wasteful number, since it uses less digits than its factorization.

68268508251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8011.

The product of its (nonzero) digits is 1843200, while the sum is 51.

The spelling of 68268508251 in words is "sixty-eight billion, two hundred sixty-eight million, five hundred eight thousand, two hundred fifty-one".