7655869261 has 2 divisors, whose sum is σ = 7655869262. Its totient is φ = 7655869260.

The previous prime is 7655869259. The next prime is 7655869321. The reversal of 7655869261 is 1629685567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6084936036 + 1570933225 = 78006^2 + 39635^2 .

It is a cyclic number.

It is not a de Polignac number, because 7655869261 - 2¹ = 7655869259 is a prime.

It is a super-2 number, since 2×7655869261² (a number of 21 digits) contains 22 as substring.

Together with 7655869259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7655869231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3827934630 + 3827934631.

It is an arithmetic number, because the mean of its divisors is an integer number (3827934631).

Almost surely, 2^7655869261 is an apocalyptic number.

It is an amenable number.

7655869261 is a deficient number, since it is larger than the sum of its proper divisors (1).

7655869261 is an equidigital number, since it uses as much as digits as its factorization.

7655869261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 55.

The square root of 7655869261 is about 87497.8243215224. The cubic root of 7655869261 is about 1970.9011192639.

The spelling of 7655869261 in words is "seven billion, six hundred fifty-five million, eight hundred sixty-nine thousand, two hundred sixty-one".