78511189995 has 48 divisors (see below), whose sum is σ = 156645914880. Its totient is φ = 35632602432.

The previous prime is 78511189951. The next prime is 78511190027. The reversal of 78511189995 is 59998111587.

It is not a de Polignac number, because 78511189995 - 2¹⁰ = 78511188971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 852769 + ... + 940338.

It is an arithmetic number, because the mean of its divisors is an integer number (3263456560).

Almost surely, 2^78511189995 is an apocalyptic number.

78511189995 is a deficient number, since it is larger than the sum of its proper divisors (78134724885).

78511189995 is a wasteful number, since it uses less digits than its factorization.

78511189995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793264 (or 1793261 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 63.

The spelling of 78511189995 in words is "seventy-eight billion, five hundred eleven million, one hundred eighty-nine thousand, nine hundred ninety-five".