87080584681 has 2 divisors, whose sum is σ = 87080584682. Its totient is φ = 87080584680.

The previous prime is 87080584609. The next prime is 87080584781. The reversal of 87080584681 is 18648508078.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73040467600 + 14040117081 = 270260^2 + 118491^2 .

It is a cyclic number.

It is not a de Polignac number, because 87080584681 - 2²³ = 87072196073 is a prime.

It is a super-2 number, since 2×87080584681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87080584601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43540292340 + 43540292341.

It is an arithmetic number, because the mean of its divisors is an integer number (43540292341).

Almost surely, 2^87080584681 is an apocalyptic number.

It is an amenable number.

87080584681 is a deficient number, since it is larger than the sum of its proper divisors (1).

87080584681 is an equidigital number, since it uses as much as digits as its factorization.

87080584681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3440640, while the sum is 55.

The spelling of 87080584681 in words is "eighty-seven billion, eighty million, five hundred eighty-four thousand, six hundred eighty-one".