11503207640 has 32 divisors (see below), whose sum is σ = 26513494560. Its totient is φ = 4489056000.

The previous prime is 11503207637. The next prime is 11503207669. The reversal of 11503207640 is 4670230511.

It is a congruent number.

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, 3505436 + ... + 3508715.

It is an arithmetic number, because the mean of its divisors is an integer number (828546705).

Almost surely, 2^11503207640 is an apocalyptic number.

11503207640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11503207640 is an abundant number, since it is smaller than the sum of its proper divisors (15010286920).

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

11503207640 is a wasteful number, since it uses less digits than its factorization.

11503207640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7014203 (or 7014199 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The spelling of 11503207640 in words is "eleven billion, five hundred three million, two hundred seven thousand, six hundred forty".