2685980691 has 6 divisors (see below), whose sum is σ = 3879749900. Its totient is φ = 1790653788.

The previous prime is 2685980677. The next prime is 2685980699. The reversal of 2685980691 is 1960895862.

It is a happy number.

It is not a de Polignac number, because 2685980691 - 2⁹ = 2685980179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2685980699) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 149221141 + ... + 149221158.

Almost surely, 2^2685980691 is an apocalyptic number.

2685980691 is a deficient number, since it is larger than the sum of its proper divisors (1193769209).

2685980691 is a wasteful number, since it uses less digits than its factorization.

2685980691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298442305 (or 298442302 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The square root of 2685980691 is about 51826.4477945383. The cubic root of 2685980691 is about 1390.0623975233.

The spelling of 2685980691 in words is "two billion, six hundred eighty-five million, nine hundred eighty thousand, six hundred ninety-one".