2685661460 has 12 divisors (see below), whose sum is σ = 5639889108. Its totient is φ = 1074264576.

The previous prime is 2685661439. The next prime is 2685661477. The reversal of 2685661460 is 641665862.

It can be written as a sum of positive squares in 2 ways, for example, as 1912487824 + 773173636 = 43732^2 + 27806^2 .

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, 67141517 + ... + 67141556.

It is an arithmetic number, because the mean of its divisors is an integer number (469990759).

Almost surely, 2^2685661460 is an apocalyptic number.

2685661460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2685661460 is an abundant number, since it is smaller than the sum of its proper divisors (2954227648).

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

2685661460 is a wasteful number, since it uses less digits than its factorization.

2685661460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134283082 (or 134283080 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 2685661460 is about 51823.3678951880. The cubic root of 2685661460 is about 1390.0073253241.

The spelling of 2685661460 in words is "two billion, six hundred eighty-five million, six hundred sixty-one thousand, four hundred sixty".