2639262768 has 20 divisors (see below), whose sum is σ = 6818095608. Its totient is φ = 879754240.

The previous prime is 2639262763. The next prime is 2639262793. The reversal of 2639262768 is 8672629362.

It is a self number, because there is not a number n which added to its sum of digits gives 2639262768.

It is not an unprimeable number, because it can be changed into a prime (2639262763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27492273 + ... + 27492368.

Almost surely, 2^2639262768 is an apocalyptic number.

It is an amenable number.

2639262768 is an abundant number, since it is smaller than the sum of its proper divisors (4178832840).

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

2639262768 is a wasteful number, since it uses less digits than its factorization.

2639262768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54984652 (or 54984646 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 51.

The square root of 2639262768 is about 51373.7556345650. The cubic root of 2639262768 is about 1381.9559828850.

The spelling of 2639262768 in words is "two billion, six hundred thirty-nine million, two hundred sixty-two thousand, seven hundred sixty-eight".