11649501880 has 32 divisors (see below), whose sum is σ = 26465868000. Its totient is φ = 4614558336.

The previous prime is 11649501839. The next prime is 11649501883. The reversal of 11649501880 is 8810594611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11649501883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1409655 + ... + 1417894.

It is an arithmetic number, because the mean of its divisors is an integer number (827058375).

Almost surely, 2^11649501880 is an apocalyptic number.

11649501880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11649501880 is an abundant number, since it is smaller than the sum of its proper divisors (14816366120).

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

11649501880 is a wasteful number, since it uses less digits than its factorization.

11649501880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2827663 (or 2827659 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 43.

The spelling of 11649501880 in words is "eleven billion, six hundred forty-nine million, five hundred one thousand, eight hundred eighty".