68549153831 has 2 divisors, whose sum is σ = 68549153832. Its totient is φ = 68549153830.

The previous prime is 68549153789. The next prime is 68549153851. The reversal of 68549153831 is 13835194586.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68549153831 - 2¹⁸ = 68548891687 is a prime.

It is a super-2 number, since 2×68549153831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68549153851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34274576915 + 34274576916.

It is an arithmetic number, because the mean of its divisors is an integer number (34274576916).

Almost surely, 2^68549153831 is an apocalyptic number.

68549153831 is a deficient number, since it is larger than the sum of its proper divisors (1).

68549153831 is an equidigital number, since it uses as much as digits as its factorization.

68549153831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3110400, while the sum is 53.

The spelling of 68549153831 in words is "sixty-eight billion, five hundred forty-nine million, one hundred fifty-three thousand, eight hundred thirty-one".