78265722375 has 24 divisors (see below), whose sum is σ = 141087010896. Its totient is φ = 41741718000.

The previous prime is 78265722361. The next prime is 78265722421. The reversal of 78265722375 is 57322756287.

78265722375 is a `hidden beast` number, since 7 + 8 + 265 + 7 + 2 + 2 + 375 = 666.

It is not a de Polignac number, because 78265722375 - 2¹⁰ = 78265721351 is a prime.

It is a super-2 number, since 2×78265722375² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34783641 + ... + 34785890.

It is an arithmetic number, because the mean of its divisors is an integer number (5878625454).

Almost surely, 2^78265722375 is an apocalyptic number.

78265722375 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78265722375 is a deficient number, since it is larger than the sum of its proper divisors (62821288521).

78265722375 is a wasteful number, since it uses less digits than its factorization.

78265722375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69569552 (or 69569539 counting only the distinct ones).

The product of its digits is 9878400, while the sum is 54.

The spelling of 78265722375 in words is "seventy-eight billion, two hundred sixty-five million, seven hundred twenty-two thousand, three hundred seventy-five".