84617389951 has 2 divisors, whose sum is σ = 84617389952. Its totient is φ = 84617389950.

The previous prime is 84617389921. The next prime is 84617390087. The reversal of 84617389951 is 15998371648.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84617389951 - 2²¹ = 84615292799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84617389951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84617389921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42308694975 + 42308694976.

It is an arithmetic number, because the mean of its divisors is an integer number (42308694976).

Almost surely, 2^84617389951 is an apocalyptic number.

84617389951 is a deficient number, since it is larger than the sum of its proper divisors (1).

84617389951 is an equidigital number, since it uses as much as digits as its factorization.

84617389951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13063680, while the sum is 61.

The spelling of 84617389951 in words is "eighty-four billion, six hundred seventeen million, three hundred eighty-nine thousand, nine hundred fifty-one".