10639651990 has 32 divisors (see below), whose sum is σ = 20916312480. Its totient is φ = 3864537600.

The previous prime is 10639651937. The next prime is 10639651991. The reversal of 10639651990 is 9915693601.

It is a super-2 number, since 2×10639651990² (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 (10639651991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42016 + ... + 151804.

It is an arithmetic number, because the mean of its divisors is an integer number (653634765).

Almost surely, 2^10639651990 is an apocalyptic number.

10639651990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10639651990 is a deficient number, since it is larger than the sum of its proper divisors (10276660490).

10639651990 is a wasteful number, since it uses less digits than its factorization.

10639651990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110688.

The product of its (nonzero) digits is 393660, while the sum is 49.

The spelling of 10639651990 in words is "ten billion, six hundred thirty-nine million, six hundred fifty-one thousand, nine hundred ninety".