11638503730 has 32 divisors (see below), whose sum is σ = 24393809664. Its totient is φ = 3915053376.

The previous prime is 11638503683. The next prime is 11638503731. The reversal of 11638503730 is 3730583611.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11638503730.

It is not an unprimeable number, because it can be changed into a prime (11638503731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1564822 + ... + 1572241.

It is an arithmetic number, because the mean of its divisors is an integer number (762306552).

Almost surely, 2^11638503730 is an apocalyptic number.

11638503730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11638503730 is an abundant number, since it is smaller than the sum of its proper divisors (12755305934).

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

11638503730 is a wasteful number, since it uses less digits than its factorization.

11638503730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3137130.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 11638503730 in words is "eleven billion, six hundred thirty-eight million, five hundred three thousand, seven hundred thirty".