86224913681 has 2 divisors, whose sum is σ = 86224913682. Its totient is φ = 86224913680.

The previous prime is 86224913653. The next prime is 86224913741. The reversal of 86224913681 is 18631942268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70055502400 + 16169411281 = 264680^2 + 127159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86224913681 is a prime.

It is a super-2 number, since 2×86224913681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86224913611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43112456840 + 43112456841.

It is an arithmetic number, because the mean of its divisors is an integer number (43112456841).

Almost surely, 2^86224913681 is an apocalyptic number.

It is an amenable number.

86224913681 is a deficient number, since it is larger than the sum of its proper divisors (1).

86224913681 is an equidigital number, since it uses as much as digits as its factorization.

86224913681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 50.

The spelling of 86224913681 in words is "eighty-six billion, two hundred twenty-four million, nine hundred thirteen thousand, six hundred eighty-one".