11639721050 has 12 divisors (see below), whose sum is σ = 21649881246. Its totient is φ = 4655888400.

The previous prime is 11639721047. The next prime is 11639721059. The reversal of 11639721050 is 5012793611.

It can be written as a sum of positive squares in 3 ways, for example, as 10746846889 + 892874161 = 103667^2 + 29881^2 .

It is a super-2 number, since 2×11639721050² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11639721050.

It is not an unprimeable number, because it can be changed into a prime (11639721059) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116397161 + ... + 116397260.

Almost surely, 2^11639721050 is an apocalyptic number.

11639721050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11639721050 is a deficient number, since it is larger than the sum of its proper divisors (10010160196).

11639721050 is a wasteful number, since it uses less digits than its factorization.

11639721050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232794433 (or 232794428 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 35.

The spelling of 11639721050 in words is "eleven billion, six hundred thirty-nine million, seven hundred twenty-one thousand, fifty".