2639999992 has 64 divisors (see below), whose sum is σ = 5964192000. Its totient is φ = 1070205696.

The previous prime is 2639999983. The next prime is 2640000019. The reversal of 2639999992 is 2999999362.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 859243 + ... + 862309.

It is an arithmetic number, because the mean of its divisors is an integer number (93190500).

Almost surely, 2^2639999992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2639999992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2982096000).

2639999992 is an abundant number, since it is smaller than the sum of its proper divisors (3324192008).

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

2639999992 is a wasteful number, since it uses less digits than its factorization.

2639999992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3908 (or 3904 counting only the distinct ones).

The product of its digits is 38263752, while the sum is 67.

The square root of 2639999992 is about 51380.9302368106. The cubic root of 2639999992 is about 1382.0846446062.

The spelling of 2639999992 in words is "two billion, six hundred thirty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-two".