2639712131880 has 128 divisors (see below), whose sum is σ = 7996226273280. Its totient is φ = 697075877120.

The previous prime is 2639712131879. The next prime is 2639712131887. The reversal of 2639712131880 is 881312179362.

It is not an unprimeable number, because it can be changed into a prime (2639712131887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34462825 + ... + 34539335.

It is an arithmetic number, because the mean of its divisors is an integer number (62470517760).

Almost surely, 2^{2639712131880} is an apocalyptic number.

2639712131880 is a gapful number since it is divisible by the number (20) 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 2639712131880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3998113136640).

2639712131880 is an abundant number, since it is smaller than the sum of its proper divisors (5356514141400).

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

2639712131880 is a wasteful number, since it uses less digits than its factorization.

2639712131880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79319 (or 79315 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 2639712131880 in words is "two trillion, six hundred thirty-nine billion, seven hundred twelve million, one hundred thirty-one thousand, eight hundred eighty".