11139621864 has 64 divisors (see below), whose sum is σ = 31992493440. Its totient is φ = 3166248960.

The previous prime is 11139621863. The next prime is 11139621869. The reversal of 11139621864 is 46812693111.

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

It is not an unprimeable number, because it can be changed into a prime (11139621863) 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, 139357 + ... + 204204.

It is an arithmetic number, because the mean of its divisors is an integer number (499882710).

Almost surely, 2^11139621864 is an apocalyptic number.

11139621864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

11139621864 is an abundant number, since it is smaller than the sum of its proper divisors (20852871576).

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

11139621864 is a wasteful number, since it uses less digits than its factorization.

11139621864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343770 (or 343766 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The spelling of 11139621864 in words is "eleven billion, one hundred thirty-nine million, six hundred twenty-one thousand, eight hundred sixty-four".