84645654631 has 2 divisors, whose sum is σ = 84645654632. Its totient is φ = 84645654630.

The previous prime is 84645654623. The next prime is 84645654677. The reversal of 84645654631 is 13645654648.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84645654631 - 2³ = 84645654623 is a prime.

It is a super-2 number, since 2×84645654631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84645654931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42322827315 + 42322827316.

It is an arithmetic number, because the mean of its divisors is an integer number (42322827316).

Almost surely, 2^84645654631 is an apocalyptic number.

84645654631 is a deficient number, since it is larger than the sum of its proper divisors (1).

84645654631 is an equidigital number, since it uses as much as digits as its factorization.

84645654631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8294400, while the sum is 52.

The spelling of 84645654631 in words is "eighty-four billion, six hundred forty-five million, six hundred fifty-four thousand, six hundred thirty-one".