1615730660 has 48 divisors (see below), whose sum is σ = 3597229440. Its totient is φ = 607495680.

The previous prime is 1615730647. The next prime is 1615730671. The reversal of 1615730660 is 660375161.

It is a happy number.

It is a super-2 number, since 2×1615730660² = 5221171131328071200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1615730660.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309875 + ... + 315045.

It is an arithmetic number, because the mean of its divisors is an integer number (74942280).

Almost surely, 2^1615730660 is an apocalyptic number.

1615730660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1615730660 is an abundant number, since it is smaller than the sum of its proper divisors (1981498780).

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

1615730660 is a wasteful number, since it uses less digits than its factorization.

1615730660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6116 (or 6114 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 1615730660 is about 40196.1523034233. The cubic root of 1615730660 is about 1173.4276624045.

The spelling of 1615730660 in words is "one billion, six hundred fifteen million, seven hundred thirty thousand, six hundred sixty".