215560113660 has 288 divisors, whose sum is σ = 693955080000. Its totient is φ = 54010478592.

The previous prime is 215560113623. The next prime is 215560113677. The reversal of 215560113660 is 66311065512.

215560113660 is a `hidden beast` number, since 2 + 1 + 5 + 560 + 1 + 1 + 36 + 60 = 666.

It is a super-2 number, since 2×215560113660² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 351647514 + ... + 351648126.

It is an arithmetic number, because the mean of its divisors is an integer number (2409566250).

Almost surely, 2^215560113660 is an apocalyptic number.

215560113660 is a gapful number since it is divisible by the number (20) 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 215560113660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346977540000).

215560113660 is an abundant number, since it is smaller than the sum of its proper divisors (478394966340).

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

215560113660 is a wasteful number, since it uses less digits than its factorization.

215560113660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325 (or 1320 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 215560113660 in words is "two hundred fifteen billion, five hundred sixty million, one hundred thirteen thousand, six hundred sixty".