2659462640 has 20 divisors (see below), whose sum is σ = 6183250824. Its totient is φ = 1063785024.

The previous prime is 2659462639. The next prime is 2659462651. The reversal of 2659462640 is 462649562.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 2659462591 and 2659462600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16621562 + ... + 16621721.

Almost surely, 2^2659462640 is an apocalyptic number.

2659462640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2659462640 is an abundant number, since it is smaller than the sum of its proper divisors (3523788184).

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

2659462640 is a wasteful number, since it uses less digits than its factorization.

2659462640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33243296 (or 33243290 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The square root of 2659462640 is about 51569.9780880310. The cubic root of 2659462640 is about 1385.4726742310.

The spelling of 2659462640 in words is "two billion, six hundred fifty-nine million, four hundred sixty-two thousand, six hundred forty".