646455554356131 has 96 divisors (see below), whose sum is σ = 1013152814069760. Its totient is φ = 394839156805632.

The previous prime is 646455554356103. The next prime is 646455554356177. The reversal of 646455554356131 is 131653455554646.

It is a happy number.

646455554356131 is a `hidden beast` number, since 6 + 4 + 6 + 4 + 5 + 5 + 5 + 5 + 4 + 3 + 5 + 613 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-646455554356131 is a prime.

It is a super-2 number, since 2×646455554356131² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (646455554396131) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 24136773166 + ... + 24136799948.

It is an arithmetic number, because the mean of its divisors is an integer number (10553675146560).

Almost surely, 2^{646455554356131} is an apocalyptic number.

646455554356131 is a deficient number, since it is larger than the sum of its proper divisors (366697259713629).

646455554356131 is a wasteful number, since it uses less digits than its factorization.

646455554356131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29145 (or 29142 counting only the distinct ones).

The product of its digits is 388800000, while the sum is 63.

The spelling of 646455554356131 in words is "six hundred forty-six trillion, four hundred fifty-five billion, five hundred fifty-four million, three hundred fifty-six thousand, one hundred thirty-one".