615078402640680 has 256 divisors, whose sum is σ = 2024337647370240. Its totient is φ = 148271247590400.

The previous prime is 615078402640673. The next prime is 615078402640697. The reversal of 615078402640680 is 86046204870516.

It is a self number, because there is not a number n which added to its sum of digits gives 615078402640680.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 165502554 + ... + 169178166.

It is an arithmetic number, because the mean of its divisors is an integer number (7907568935040).

Almost surely, 2^{615078402640680} is an apocalyptic number.

615078402640680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 615078402640680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1012168823685120).

615078402640680 is an abundant number, since it is smaller than the sum of its proper divisors (1409259244729560).

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

615078402640680 is a wasteful number, since it uses less digits than its factorization.

615078402640680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3676352 (or 3676348 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 57.

The spelling of 615078402640680 in words is "six hundred fifteen trillion, seventy-eight billion, four hundred two million, six hundred forty thousand, six hundred eighty".