78888577751 has 4 divisors (see below), whose sum is σ = 81020701512. Its totient is φ = 76756453992.

The previous prime is 78888577739. The next prime is 78888577769. The reversal of 78888577751 is 15777588887.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78888577751 - 2¹⁸ = 78888315607 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 (78888577721) 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 3 ways as a sum of consecutive naturals, for example, 1066061825 + ... + 1066061898.

It is an arithmetic number, because the mean of its divisors is an integer number (20255175378).

Almost surely, 2^78888577751 is an apocalyptic number.

78888577751 is a deficient number, since it is larger than the sum of its proper divisors (2132123761).

78888577751 is a wasteful number, since it uses less digits than its factorization.

78888577751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132123760.

The product of its digits is 245862400, while the sum is 71.

The spelling of 78888577751 in words is "seventy-eight billion, eight hundred eighty-eight million, five hundred seventy-seven thousand, seven hundred fifty-one".