84980978415 has 16 divisors (see below), whose sum is σ = 151077295200. Its totient is φ = 45323188416.

The previous prime is 84980978371. The next prime is 84980978449. The reversal of 84980978415 is 51487908948.

It is not a de Polignac number, because 84980978415 - 2²¹ = 84978881263 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314744230 + ... + 314744499.

It is an arithmetic number, because the mean of its divisors is an integer number (9442330950).

Almost surely, 2^84980978415 is an apocalyptic number.

84980978415 is a deficient number, since it is larger than the sum of its proper divisors (66096316785).

84980978415 is a wasteful number, since it uses less digits than its factorization.

84980978415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629488743 (or 629488737 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 63.

The spelling of 84980978415 in words is "eighty-four billion, nine hundred eighty million, nine hundred seventy-eight thousand, four hundred fifteen".