2691722985 has 16 divisors (see below), whose sum is σ = 4922007936. Its totient is φ = 1230501888.

The previous prime is 2691722977. The next prime is 2691723017. The reversal of 2691722985 is 5892271962.

It is not a de Polignac number, because 2691722985 - 2³ = 2691722977 is a prime.

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, 12817624 + ... + 12817833.

It is an arithmetic number, because the mean of its divisors is an integer number (307625496).

Almost surely, 2^2691722985 is an apocalyptic number.

It is an amenable number.

2691722985 is a deficient number, since it is larger than the sum of its proper divisors (2230284951).

2691722985 is a wasteful number, since it uses less digits than its factorization.

2691722985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25635472.

The product of its digits is 1088640, while the sum is 51.

The square root of 2691722985 is about 51881.8174797298. The cubic root of 2691722985 is about 1391.0522861770.

The spelling of 2691722985 in words is "two billion, six hundred ninety-one million, seven hundred twenty-two thousand, nine hundred eighty-five".