6615980538 has 32 divisors (see below), whose sum is σ = 13994442240. Its totient is φ = 2079347760.

The previous prime is 6615980533. The next prime is 6615980549. The reversal of 6615980538 is 8350895166.

It is not an unprimeable number, because it can be changed into a prime (6615980533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113470 + ... + 161577.

It is an arithmetic number, because the mean of its divisors is an integer number (437326320).

Almost surely, 2^6615980538 is an apocalyptic number.

6615980538 is an abundant number, since it is smaller than the sum of its proper divisors (7378461702).

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

6615980538 is a wasteful number, since it uses less digits than its factorization.

6615980538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275282.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The square root of 6615980538 is about 81338.6779951580. The cubic root of 6615980538 is about 1877.2901711187.

The spelling of 6615980538 in words is "six billion, six hundred fifteen million, nine hundred eighty thousand, five hundred thirty-eight".