10640951990 has 32 divisors (see below), whose sum is σ = 19275459840. Its totient is φ = 4229366400.

The previous prime is 10640951977. The next prime is 10640951999. The reversal of 10640951990 is 9915904601.

It is a super-2 number, since 2×10640951990² (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 (10640951999) 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, 4105595 + ... + 4108185.

It is an arithmetic number, because the mean of its divisors is an integer number (602358120).

Almost surely, 2^10640951990 is an apocalyptic number.

10640951990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10640951990 is a deficient number, since it is larger than the sum of its proper divisors (8634507850).

10640951990 is a wasteful number, since it uses less digits than its factorization.

10640951990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5048.

The product of its (nonzero) digits is 87480, while the sum is 44.

The spelling of 10640951990 in words is "ten billion, six hundred forty million, nine hundred fifty-one thousand, nine hundred ninety".