84694180639 has 2 divisors, whose sum is σ = 84694180640. Its totient is φ = 84694180638.

The previous prime is 84694180583. The next prime is 84694180667. The reversal of 84694180639 is 93608149648.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84694180639 - 2⁷ = 84694180511 is a prime.

It is a super-2 number, since 2×84694180639² (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 (84694180679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42347090319 + 42347090320.

It is an arithmetic number, because the mean of its divisors is an integer number (42347090320).

Almost surely, 2^84694180639 is an apocalyptic number.

84694180639 is a deficient number, since it is larger than the sum of its proper divisors (1).

84694180639 is an equidigital number, since it uses as much as digits as its factorization.

84694180639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8957952, while the sum is 58.

The spelling of 84694180639 in words is "eighty-four billion, six hundred ninety-four million, one hundred eighty thousand, six hundred thirty-nine".