86789991851 has 8 divisors (see below), whose sum is σ = 87034543680. Its totient is φ = 86545754568.

The previous prime is 86789991817. The next prime is 86789991877. The reversal of 86789991851 is 15819998768.

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 86789991851 - 2²² = 86785797547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86789997851) 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, 479540 + ... + 635246.

It is an arithmetic number, because the mean of its divisors is an integer number (10879317960).

Almost surely, 2^86789991851 is an apocalyptic number.

86789991851 is a deficient number, since it is larger than the sum of its proper divisors (244551829).

86789991851 is a wasteful number, since it uses less digits than its factorization.

86789991851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157273.

The product of its digits is 78382080, while the sum is 71.

The spelling of 86789991851 in words is "eighty-six billion, seven hundred eighty-nine million, nine hundred ninety-one thousand, eight hundred fifty-one".