11615801560 has 96 divisors (see below), whose sum is σ = 29396117520. Its totient is φ = 4125623040.

The previous prime is 11615801539. The next prime is 11615801579. The reversal of 11615801560 is 6510851611.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180214 + ... + 236026.

Almost surely, 2^11615801560 is an apocalyptic number.

11615801560 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 11615801560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14698058760).

11615801560 is an abundant number, since it is smaller than the sum of its proper divisors (17780315960).

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

11615801560 is a wasteful number, since it uses less digits than its factorization.

11615801560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55889 (or 55874 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 34.

The spelling of 11615801560 in words is "eleven billion, six hundred fifteen million, eight hundred one thousand, five hundred sixty".