11615213646 has 64 divisors (see below), whose sum is σ = 27352800000. Its totient is φ = 3643297056.

The previous prime is 11615213633. The next prime is 11615213651. The reversal of 11615213646 is 64631251611.

11615213646 is a `hidden beast` number, since 1 + 1 + 6 + 1 + 5 + 2 + 1 + 3 + 646 = 666.

It is a super-2 number, since 2×11615213646² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11615213646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114885 + ... + 190863.

It is an arithmetic number, because the mean of its divisors is an integer number (427387500).

Almost surely, 2^11615213646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11615213646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13676400000).

11615213646 is an abundant number, since it is smaller than the sum of its proper divisors (15737586354).

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

11615213646 is a wasteful number, since it uses less digits than its factorization.

11615213646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76158 (or 76152 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The spelling of 11615213646 in words is "eleven billion, six hundred fifteen million, two hundred thirteen thousand, six hundred forty-six".