87796118569 has 2 divisors, whose sum is σ = 87796118570. Its totient is φ = 87796118568.

The previous prime is 87796118561. The next prime is 87796118573. The reversal of 87796118569 is 96581169778.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86855162944 + 940955625 = 294712^2 + 30675^2 .

It is a cyclic number.

It is not a de Polignac number, because 87796118569 - 2³ = 87796118561 is a prime.

It is a super-2 number, since 2×87796118569² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87796118561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43898059284 + 43898059285.

It is an arithmetic number, because the mean of its divisors is an integer number (43898059285).

Almost surely, 2^87796118569 is an apocalyptic number.

It is an amenable number.

87796118569 is a deficient number, since it is larger than the sum of its proper divisors (1).

87796118569 is an equidigital number, since it uses as much as digits as its factorization.

87796118569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45722880, while the sum is 67.

The spelling of 87796118569 in words is "eighty-seven billion, seven hundred ninety-six million, one hundred eighteen thousand, five hundred sixty-nine".