10639991232 has 126 divisors (see below), whose sum is σ = 33024345432. Its totient is φ = 3273813504.

The previous prime is 10639991231. The next prime is 10639991237. The reversal of 10639991232 is 23219993601.

10639991232 is a `hidden beast` number, since 1 + 0 + 639 + 9 + 9 + 1 + 2 + 3 + 2 = 666.

It is a super-2 number, since 2×10639991232² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10639991231) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 42693 + ... + 151995.

Almost surely, 2^10639991232 is an apocalyptic number.

10639991232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10639991232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16512172716).

10639991232 is an abundant number, since it is smaller than the sum of its proper divisors (22384354200).

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

10639991232 is a wasteful number, since it uses less digits than its factorization.

10639991232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109347 (or 109321 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The spelling of 10639991232 in words is "ten billion, six hundred thirty-nine million, nine hundred ninety-one thousand, two hundred thirty-two".