11503919616 has 80 divisors (see below), whose sum is σ = 35025359424. Its totient is φ = 3286831104.

The previous prime is 11503919597. The next prime is 11503919621. The reversal of 11503919616 is 61691930511.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524215 + ... + 545718.

Almost surely, 2^11503919616 is an apocalyptic number.

11503919616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11503919616 is an abundant number, since it is smaller than the sum of its proper divisors (23521439808).

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

11503919616 is an equidigital number, since it uses as much as digits as its factorization.

11503919616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069961 (or 1069945 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 42.

The spelling of 11503919616 in words is "eleven billion, five hundred three million, nine hundred nineteen thousand, six hundred sixteen".