78140722725 has 144 divisors (see below), whose sum is σ = 159798772224. Its totient is φ = 36220608000.

The previous prime is 78140722657. The next prime is 78140722741. The reversal of 78140722725 is 52722704187.

It is not a de Polignac number, because 78140722725 - 2⁹ = 78140722213 is a prime.

It is a super-2 number, since 2×78140722725² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3343330 + ... + 3366620.

It is an arithmetic number, because the mean of its divisors is an integer number (1109713696).

Almost surely, 2^78140722725 is an apocalyptic number.

78140722725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78140722725 is an abundant number, since it is smaller than the sum of its proper divisors (81658049499).

78140722725 is a wasteful number, since it uses less digits than its factorization.

78140722725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23388 (or 23380 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 45.

The spelling of 78140722725 in words is "seventy-eight billion, one hundred forty million, seven hundred twenty-two thousand, seven hundred twenty-five".