2631091288 has 32 divisors (see below), whose sum is σ = 5640314400. Its totient is φ = 1127158272.

The previous prime is 2631091271. The next prime is 2631091301. The reversal of 2631091288 is 8821901362.

It is a self number, because there is not a number n which added to its sum of digits gives 2631091288.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157648 + ... + 173536.

It is an arithmetic number, because the mean of its divisors is an integer number (176259825).

Almost surely, 2^2631091288 is an apocalyptic number.

2631091288 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2631091288 is an abundant number, since it is smaller than the sum of its proper divisors (3009223112).

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

2631091288 is a wasteful number, since it uses less digits than its factorization.

2631091288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18859 (or 18855 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 2631091288 is about 51294.1642684624. The cubic root of 2631091288 is about 1380.5282735578.

The spelling of 2631091288 in words is "two billion, six hundred thirty-one million, ninety-one thousand, two hundred eighty-eight".