86358781242 has 12 divisors (see below), whose sum is σ = 187110692730. Its totient is φ = 28786260408.

The previous prime is 86358781213. The next prime is 86358781259. The reversal of 86358781242 is 24218785368.

86358781242 is a `hidden beast` number, since 8 + 6 + 3 + 587 + 8 + 12 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 85919920641 + 438860601 = 293121^2 + 20949^2 .

It is a super-2 number, since 2×86358781242² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2398855017 + ... + 2398855052.

Almost surely, 2^86358781242 is an apocalyptic number.

86358781242 is an abundant number, since it is smaller than the sum of its proper divisors (100751911488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86358781242 is a wasteful number, since it uses less digits than its factorization.

86358781242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4797710077 (or 4797710074 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The spelling of 86358781242 in words is "eighty-six billion, three hundred fifty-eight million, seven hundred eighty-one thousand, two hundred forty-two".