87876653261 has 2 divisors, whose sum is σ = 87876653262. Its totient is φ = 87876653260.

The previous prime is 87876653243. The next prime is 87876653393. The reversal of 87876653261 is 16235667878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72028361161 + 15848292100 = 268381^2 + 125890^2 .

It is a cyclic number.

It is not a de Polignac number, because 87876653261 - 2¹⁸ = 87876391117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87876653261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87876653201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43938326630 + 43938326631.

It is an arithmetic number, because the mean of its divisors is an integer number (43938326631).

Almost surely, 2^87876653261 is an apocalyptic number.

It is an amenable number.

87876653261 is a deficient number, since it is larger than the sum of its proper divisors (1).

87876653261 is an equidigital number, since it uses as much as digits as its factorization.

87876653261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 59.

The spelling of 87876653261 in words is "eighty-seven billion, eight hundred seventy-six million, six hundred fifty-three thousand, two hundred sixty-one".