84216872079 has 12 divisors (see below), whose sum is σ = 122604441856. Its totient is φ = 55702497312.

The previous prime is 84216872039. The next prime is 84216872081. The reversal of 84216872079 is 97027861248.

It is a happy number.

84216872079 is a `hidden beast` number, since 8 + 421 + 6 + 8 + 7 + 207 + 9 = 666.

It is not a de Polignac number, because 84216872079 - 2²⁸ = 83948436623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84216872039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36839134 + ... + 36841419.

Almost surely, 2^84216872079 is an apocalyptic number.

84216872079 is a deficient number, since it is larger than the sum of its proper divisors (38387569777).

84216872079 is a wasteful number, since it uses less digits than its factorization.

84216872079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73680686 (or 73680683 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 84216872079 in words is "eighty-four billion, two hundred sixteen million, eight hundred seventy-two thousand, seventy-nine".