64126657031 has 2 divisors, whose sum is σ = 64126657032. Its totient is φ = 64126657030.

The previous prime is 64126657027. The next prime is 64126657039. The reversal of 64126657031 is 13075662146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64126657031 - 2² = 64126657027 is a prime.

It is a super-2 number, since 2×64126657031² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64126657031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64126657039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32063328515 + 32063328516.

It is an arithmetic number, because the mean of its divisors is an integer number (32063328516).

Almost surely, 2^64126657031 is an apocalyptic number.

64126657031 is a deficient number, since it is larger than the sum of its proper divisors (1).

64126657031 is an equidigital number, since it uses as much as digits as its factorization.

64126657031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 64126657031 in words is "sixty-four billion, one hundred twenty-six million, six hundred fifty-seven thousand, thirty-one".