2691265957 has 2 divisors, whose sum is σ = 2691265958. Its totient is φ = 2691265956.

The previous prime is 2691265939. The next prime is 2691265981. The reversal of 2691265957 is 7595621962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2614685956 + 76580001 = 51134^2 + 8751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2691265957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2691265987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345632978 + 1345632979.

It is an arithmetic number, because the mean of its divisors is an integer number (1345632979).

Almost surely, 2^2691265957 is an apocalyptic number.

It is an amenable number.

2691265957 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691265957 is an equidigital number, since it uses as much as digits as its factorization.

2691265957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 52.

The square root of 2691265957 is about 51877.4127824432. The cubic root of 2691265957 is about 1390.9735527372.

The spelling of 2691265957 in words is "two billion, six hundred ninety-one million, two hundred sixty-five thousand, nine hundred fifty-seven".