87078698081 has 2 divisors, whose sum is σ = 87078698082. Its totient is φ = 87078698080.

The previous prime is 87078698071. The next prime is 87078698093. The reversal of 87078698081 is 18089687078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43698139681 + 43380558400 = 209041^2 + 208280^2 .

It is a cyclic number.

It is not a de Polignac number, because 87078698081 - 2²² = 87074503777 is a prime.

It is a super-2 number, since 2×87078698081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87078698071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43539349040 + 43539349041.

It is an arithmetic number, because the mean of its divisors is an integer number (43539349041).

Almost surely, 2^87078698081 is an apocalyptic number.

It is an amenable number.

87078698081 is a deficient number, since it is larger than the sum of its proper divisors (1).

87078698081 is an equidigital number, since it uses as much as digits as its factorization.

87078698081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10838016, while the sum is 62.

The spelling of 87078698081 in words is "eighty-seven billion, seventy-eight million, six hundred ninety-eight thousand, eighty-one".