87765697646651 has 2 divisors, whose sum is σ = 87765697646652. Its totient is φ = 87765697646650.

The previous prime is 87765697646633. The next prime is 87765697646681. The reversal of 87765697646651 is 15664679656778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87765697646651 - 2⁶ = 87765697646587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87765697646651.

It is not a weakly prime, because it can be changed into another prime (87765697646681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43882848823325 + 43882848823326.

It is an arithmetic number, because the mean of its divisors is an integer number (43882848823326).

Almost surely, 2^{87765697646651} is an apocalyptic number.

87765697646651 is a deficient number, since it is larger than the sum of its proper divisors (1).

87765697646651 is an equidigital number, since it uses as much as digits as its factorization.

87765697646651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19203609600, while the sum is 83.

The spelling of 87765697646651 in words is "eighty-seven trillion, seven hundred sixty-five billion, six hundred ninety-seven million, six hundred forty-six thousand, six hundred fifty-one".