86909361981 has 16 divisors (see below), whose sum is σ = 124806728256. Its totient is φ = 53476770816.

The previous prime is 86909361971. The next prime is 86909361997. The reversal of 86909361981 is 18916390968.

It is not a de Polignac number, because 86909361981 - 2⁵ = 86909361949 is a prime.

It is a super-2 number, since 2×86909361981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86909361941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248221 + ... + 485213.

It is an arithmetic number, because the mean of its divisors is an integer number (7800420516).

Almost surely, 2^86909361981 is an apocalyptic number.

It is an amenable number.

86909361981 is a deficient number, since it is larger than the sum of its proper divisors (37897366275).

86909361981 is a wasteful number, since it uses less digits than its factorization.

86909361981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246412.

The product of its (nonzero) digits is 5038848, while the sum is 60.

The spelling of 86909361981 in words is "eighty-six billion, nine hundred nine million, three hundred sixty-one thousand, nine hundred eighty-one".