86949799581 has 8 divisors (see below), whose sum is σ = 122752658304. Its totient is φ = 54556736960.

The previous prime is 86949799561. The next prime is 86949799591. The reversal of 86949799581 is 18599794968.

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

It is a cyclic number.

It is not a de Polignac number, because 86949799581 - 2³⁴ = 69769930397 is a prime.

It is a super-2 number, since 2×86949799581² (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 (86949799561) 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, 852448965 + ... + 852449066.

It is an arithmetic number, because the mean of its divisors is an integer number (15344082288).

Almost surely, 2^86949799581 is an apocalyptic number.

It is an amenable number.

86949799581 is a deficient number, since it is larger than the sum of its proper divisors (35802858723).

86949799581 is a wasteful number, since it uses less digits than its factorization.

86949799581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704898051.

The product of its digits is 352719360, while the sum is 75.

The spelling of 86949799581 in words is "eighty-six billion, nine hundred forty-nine million, seven hundred ninety-nine thousand, five hundred eighty-one".