2691139085 has 16 divisors (see below), whose sum is σ = 3284442432. Its totient is φ = 2116329600.

The previous prime is 2691139079. The next prime is 2691139091. The reversal of 2691139085 is 5809311962.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2691139079) and next prime (2691139091).

It is not a de Polignac number, because 2691139085 - 2⁴ = 2691139069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156305 + ... + 172665.

It is an arithmetic number, because the mean of its divisors is an integer number (205277652).

Almost surely, 2^2691139085 is an apocalyptic number.

It is an amenable number.

2691139085 is a deficient number, since it is larger than the sum of its proper divisors (593303347).

2691139085 is a wasteful number, since it uses less digits than its factorization.

2691139085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16924.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 2691139085 is about 51876.1899622553. The cubic root of 2691139085 is about 1390.9516945767.

The spelling of 2691139085 in words is "two billion, six hundred ninety-one million, one hundred thirty-nine thousand, eighty-five".