5615511660 has 72 divisors (see below), whose sum is σ = 18582245136. Its totient is φ = 1361335680.

The previous prime is 5615511653. The next prime is 5615511667. The reversal of 5615511660 is 661155165.

It is an interprime number because it is at equal distance from previous prime (5615511653) and next prime (5615511667).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (5615511667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1416079 + ... + 1420038.

It is an arithmetic number, because the mean of its divisors is an integer number (258086738).

Almost surely, 2^5615511660 is an apocalyptic number.

It is an amenable number.

5615511660 is an abundant number, since it is smaller than the sum of its proper divisors (12966733476).

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

5615511660 is a wasteful number, since it uses less digits than its factorization.

5615511660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836143 (or 2836138 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 5615511660 is about 74936.7177023387. The cubic root of 5615511660 is about 1777.4461187059.

The spelling of 5615511660 in words is "five billion, six hundred fifteen million, five hundred eleven thousand, six hundred sixty".