2631868690 has 32 divisors (see below), whose sum is σ = 5334750720. Its totient is φ = 926169600.

The previous prime is 2631868661. The next prime is 2631868703. The reversal of 2631868690 is 968681362.

It is a happy number.

It is a super-2 number, since 2×2631868690² = 13853465602804632200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382495 + ... + 389314.

It is an arithmetic number, because the mean of its divisors is an integer number (166710960).

Almost surely, 2^2631868690 is an apocalyptic number.

2631868690 is an abundant number, since it is smaller than the sum of its proper divisors (2702882030).

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

2631868690 is a wasteful number, since it uses less digits than its factorization.

2631868690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771858.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 2631868690 is about 51301.7415883711. The cubic root of 2631868690 is about 1380.6642272541.

The spelling of 2631868690 in words is "two billion, six hundred thirty-one million, eight hundred sixty-eight thousand, six hundred ninety".