86196389721 has 24 divisors (see below), whose sum is σ = 124534228896. Its totient is φ = 53007701760.

The previous prime is 86196389711. The next prime is 86196389723. The reversal of 86196389721 is 12798369168.

It is not a de Polignac number, because 86196389721 - 2⁷ = 86196389593 is a prime.

It is a super-5 number, since 5×86196389721⁵ (a number of 56 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (86196389723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 694561 + ... + 809201.

It is an arithmetic number, because the mean of its divisors is an integer number (5188926204).

Almost surely, 2^86196389721 is an apocalyptic number.

It is an amenable number.

86196389721 is a deficient number, since it is larger than the sum of its proper divisors (38337839175).

86196389721 is a wasteful number, since it uses less digits than its factorization.

86196389721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116153 (or 116140 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 60.

The spelling of 86196389721 in words is "eighty-six billion, one hundred ninety-six million, three hundred eighty-nine thousand, seven hundred twenty-one".