68956451519 has 16 divisors (see below), whose sum is σ = 70766592192. Its totient is φ = 67165932288.

The previous prime is 68956451503. The next prime is 68956451527. The reversal of 68956451519 is 91515465986.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 68956451519 - 2⁴ = 68956451503 is a prime.

It is a super-2 number, since 2×68956451519² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68956451539) 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, 11921102 + ... + 11926884.

It is an arithmetic number, because the mean of its divisors is an integer number (4422912012).

Almost surely, 2^68956451519 is an apocalyptic number.

68956451519 is a deficient number, since it is larger than the sum of its proper divisors (1810140673).

68956451519 is a wasteful number, since it uses less digits than its factorization.

68956451519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7426.

The product of its digits is 11664000, while the sum is 59.

The spelling of 68956451519 in words is "sixty-eight billion, nine hundred fifty-six million, four hundred fifty-one thousand, five hundred nineteen".