68313079557 has 12 divisors (see below), whose sum is σ = 102077015820. Its totient is φ = 43971637248.

The previous prime is 68313079507. The next prime is 68313079561. The reversal of 68313079557 is 75597031386.

68313079557 is a `hidden beast` number, since 6 + 8 + 3 + 13 + 0 + 79 + 557 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 56827884996 + 11485194561 = 238386^2 + 107169^2 .

It is not a de Polignac number, because 68313079557 - 2¹⁸ = 68312817413 is a prime.

It is a super-2 number, since 2×68313079557² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68313079507) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 130867708 + ... + 130868229.

It is an arithmetic number, because the mean of its divisors is an integer number (8506417985).

Almost surely, 2^68313079557 is an apocalyptic number.

It is an amenable number.

68313079557 is a deficient number, since it is larger than the sum of its proper divisors (33763936263).

68313079557 is a wasteful number, since it uses less digits than its factorization.

68313079557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261735972 (or 261735969 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 54.

The spelling of 68313079557 in words is "sixty-eight billion, three hundred thirteen million, seventy-nine thousand, five hundred fifty-seven".