11615513240 has 32 divisors (see below), whose sum is σ = 26334419760. Its totient is φ = 4610736000.

The previous prime is 11615513207. The next prime is 11615513249. The reversal of 11615513240 is 4231551611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11615513249) 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, 1103111 + ... + 1113590.

Almost surely, 2^11615513240 is an apocalyptic number.

11615513240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11615513240 is an abundant number, since it is smaller than the sum of its proper divisors (14718906520).

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

11615513240 is a wasteful number, since it uses less digits than its factorization.

11615513240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216843 (or 2216839 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 11615513240 in words is "eleven billion, six hundred fifteen million, five hundred thirteen thousand, two hundred forty".