2631999136 has 48 divisors (see below), whose sum is σ = 5643124200. Its totient is φ = 1201102848.

The previous prime is 2631999127. The next prime is 2631999151. The reversal of 2631999136 is 6319991362.

It can be written as a sum of positive squares in 4 ways, for example, as 483120400 + 2148878736 = 21980^2 + 46356^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2631999136.

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, 1480 + ... + 72568.

Almost surely, 2^2631999136 is an apocalyptic number.

2631999136 is a gapful number since it is divisible by the number (26) 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 2631999136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2821562100).

2631999136 is an abundant number, since it is smaller than the sum of its proper divisors (3011125064).

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

2631999136 is a wasteful number, since it uses less digits than its factorization.

2631999136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71201 (or 71193 counting only the distinct ones).

The product of its digits is 472392, while the sum is 49.

The square root of 2631999136 is about 51303.0129329653. The cubic root of 2631999136 is about 1380.6870373017.

The spelling of 2631999136 in words is "two billion, six hundred thirty-one million, nine hundred ninety-nine thousand, one hundred thirty-six".