2605661696 has 40 divisors (see below), whose sum is σ = 5679540504. Its totient is φ = 1184389120.

The previous prime is 2605661671. The next prime is 2605661711. The reversal of 2605661696 is 6961665062.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2605661696.

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, 225695 + ... + 236958.

Almost surely, 2^2605661696 is an apocalyptic number.

It is an amenable number.

2605661696 is an abundant number, since it is smaller than the sum of its proper divisors (3073878808).

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

2605661696 is an equidigital number, since it uses as much as digits as its factorization.

2605661696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462682 (or 462666 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 2605661696 is about 51045.6824422987. The cubic root of 2605661696 is about 1376.0662488385.

It can be divided in two parts, 260566 and 1696, that added together give a palindrome (262262).

The spelling of 2605661696 in words is "two billion, six hundred five million, six hundred sixty-one thousand, six hundred ninety-six".