10990862640 has 120 divisors (see below), whose sum is σ = 36955009728. Its totient is φ = 2927400960.

The previous prime is 10990862633. The next prime is 10990862653. The reversal of 10990862640 is 4626809901.

It is a happy number.

10990862640 is a `hidden beast` number, since 10 + 9 + 9 + 0 + 8 + 626 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 625657 + ... + 642983.

Almost surely, 2^10990862640 is an apocalyptic number.

10990862640 is a gapful number since it is divisible by the number (10) 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 10990862640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18477504864).

10990862640 is an abundant number, since it is smaller than the sum of its proper divisors (25964147088).

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

10990862640 is a wasteful number, since it uses less digits than its factorization.

10990862640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18227 (or 18218 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 10990862640 in words is "ten billion, nine hundred ninety million, eight hundred sixty-two thousand, six hundred forty".