78258315340 has 24 divisors (see below), whose sum is σ = 164756439792. Its totient is φ = 31224473280.

The previous prime is 78258315337. The next prime is 78258315349. The reversal of 78258315340 is 4351385287.

It is a super-2 number, since 2×78258315340² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78258315349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4920166 + ... + 4936045.

It is an arithmetic number, because the mean of its divisors is an integer number (6864851658).

Almost surely, 2^78258315340 is an apocalyptic number.

It is an amenable number.

78258315340 is an abundant number, since it is smaller than the sum of its proper divisors (86498124452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78258315340 is a wasteful number, since it uses less digits than its factorization.

78258315340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9856617 (or 9856615 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 78258315340 in words is "seventy-eight billion, two hundred fifty-eight million, three hundred fifteen thousand, three hundred forty".