78945944415 has 32 divisors (see below), whose sum is σ = 138924205056. Its totient is φ = 38038761600.

The previous prime is 78945944333. The next prime is 78945944477. The reversal of 78945944415 is 51444954987.

It is not a de Polignac number, because 78945944415 - 2⁸ = 78945944159 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4297761 + ... + 4316090.

It is an arithmetic number, because the mean of its divisors is an integer number (4341381408).

Almost surely, 2^78945944415 is an apocalyptic number.

78945944415 is a deficient number, since it is larger than the sum of its proper divisors (59978260641).

78945944415 is a wasteful number, since it uses less digits than its factorization.

78945944415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8613919.

The product of its digits is 29030400, while the sum is 60.

The spelling of 78945944415 in words is "seventy-eight billion, nine hundred forty-five million, nine hundred forty-four thousand, four hundred fifteen".