78992448971 has 16 divisors (see below), whose sum is σ = 81315995904. Its totient is φ = 76692333984.

The previous prime is 78992448959. The next prime is 78992449001. The reversal of 78992448971 is 17984429987.

It is a cyclic number.

It is not a de Polignac number, because 78992448971 - 2⁶ = 78992448907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78992448071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5273825 + ... + 5288781.

It is an arithmetic number, because the mean of its divisors is an integer number (5082249744).

Almost surely, 2^78992448971 is an apocalyptic number.

78992448971 is a deficient number, since it is larger than the sum of its proper divisors (2323546933).

78992448971 is a wasteful number, since it uses less digits than its factorization.

78992448971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15730.

The product of its digits is 73156608, while the sum is 68.

The spelling of 78992448971 in words is "seventy-eight billion, nine hundred ninety-two million, four hundred forty-eight thousand, nine hundred seventy-one".