2691871951 has 2 divisors, whose sum is σ = 2691871952. Its totient is φ = 2691871950.

The previous prime is 2691871943. The next prime is 2691871969. The reversal of 2691871951 is 1591781962.

2691871951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2691871951 - 2³ = 2691871943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2691871895 and 2691871904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2691871921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345935975 + 1345935976.

It is an arithmetic number, because the mean of its divisors is an integer number (1345935976).

Almost surely, 2^2691871951 is an apocalyptic number.

2691871951 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691871951 is an equidigital number, since it uses as much as digits as its factorization.

2691871951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 49.

The square root of 2691871951 is about 51883.2530880630. The cubic root of 2691871951 is about 1391.0779470237.

The spelling of 2691871951 in words is "two billion, six hundred ninety-one million, eight hundred seventy-one thousand, nine hundred fifty-one".