2659912640 has 112 divisors (see below), whose sum is σ = 7896904704. Its totient is φ = 829056000.

The previous prime is 2659912627. The next prime is 2659912681. The reversal of 2659912640 is 462199562.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 2659912591 and 2659912600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29336 + ... + 78615.

Almost surely, 2^2659912640 is an apocalyptic number.

2659912640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2659912640 is an abundant number, since it is smaller than the sum of its proper divisors (5236992064).

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

2659912640 is a wasteful number, since it uses less digits than its factorization.

2659912640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107986 (or 107976 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 2659912640 is about 51574.3409070829. The cubic root of 2659912640 is about 1385.5508137685.

The spelling of 2659912640 in words is "two billion, six hundred fifty-nine million, nine hundred twelve thousand, six hundred forty".