78728572223 has 16 divisors (see below), whose sum is σ = 94509290496. Its totient is φ = 64120161600.

The previous prime is 78728572199. The next prime is 78728572229. The reversal of 78728572223 is 32227582787.

It is a cyclic number.

It is not a de Polignac number, because 78728572223 - 2⁸ = 78728571967 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 (78728572229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1594886 + ... + 1643507.

It is an arithmetic number, because the mean of its divisors is an integer number (5906830656).

Almost surely, 2^78728572223 is an apocalyptic number.

78728572223 is a deficient number, since it is larger than the sum of its proper divisors (15780718273).

78728572223 is a wasteful number, since it uses less digits than its factorization.

78728572223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238574.

The product of its digits is 5268480, while the sum is 53.

The spelling of 78728572223 in words is "seventy-eight billion, seven hundred twenty-eight million, five hundred seventy-two thousand, two hundred twenty-three".