11615320560 has 320 divisors, whose sum is σ = 38671810560. Its totient is φ = 2878878720.

The previous prime is 11615320553. The next prime is 11615320573. The reversal of 11615320560 is 6502351611.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 20630839 + ... + 20631401.

It is an arithmetic number, because the mean of its divisors is an integer number (120849408).

Almost surely, 2^11615320560 is an apocalyptic number.

11615320560 is a gapful number since it is divisible by the number (10) 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 11615320560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19335905280).

11615320560 is an abundant number, since it is smaller than the sum of its proper divisors (27056490000).

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

11615320560 is a wasteful number, since it uses less digits than its factorization.

11615320560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The spelling of 11615320560 in words is "eleven billion, six hundred fifteen million, three hundred twenty thousand, five hundred sixty".