2639274864 has 40 divisors (see below), whose sum is σ = 6844688400. Its totient is φ = 876331008.

The previous prime is 2639274853. The next prime is 2639274889. The reversal of 2639274864 is 4684729362.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94639 + ... + 119310.

It is an arithmetic number, because the mean of its divisors is an integer number (171117210).

Almost surely, 2^2639274864 is an apocalyptic number.

2639274864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2639274864 is an abundant number, since it is smaller than the sum of its proper divisors (4205413536).

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

2639274864 is a wasteful number, since it uses less digits than its factorization.

2639274864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214217 (or 214211 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 51.

The square root of 2639274864 is about 51373.8733599093. The cubic root of 2639274864 is about 1381.9580940951.

The spelling of 2639274864 in words is "two billion, six hundred thirty-nine million, two hundred seventy-four thousand, eight hundred sixty-four".