86612872781561 has 8 divisors (see below), whose sum is σ = 99000550937280. Its totient is φ = 74228797279728.

The previous prime is 86612872781549. The next prime is 86612872781579. The reversal of 86612872781561 is 16518727821668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86612872781561 - 2³⁸ = 86337994874617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86612872781491 and 86612872781500.

It is not an unprimeable number, because it can be changed into a prime (86612872781861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 900611951 + ... + 900708116.

It is an arithmetic number, because the mean of its divisors is an integer number (12375068867160).

Almost surely, 2^{86612872781561} is an apocalyptic number.

It is an amenable number.

86612872781561 is a deficient number, since it is larger than the sum of its proper divisors (12387678155719).

86612872781561 is a wasteful number, since it uses less digits than its factorization.

86612872781561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801326943.

The product of its digits is 108380160, while the sum is 68.

The spelling of 86612872781561 in words is "eighty-six trillion, six hundred twelve billion, eight hundred seventy-two million, seven hundred eighty-one thousand, five hundred sixty-one".