86841974491 has 16 divisors (see below), whose sum is σ = 88412163840. Its totient is φ = 85280326560.

The previous prime is 86841974489. The next prime is 86841974509. The reversal of 86841974491 is 19447914868.

It is a cyclic number.

It is not a de Polignac number, because 86841974491 - 2¹ = 86841974489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86841974411) 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, 47016930 + ... + 47018776.

It is an arithmetic number, because the mean of its divisors is an integer number (5525760240).

Almost surely, 2^86841974491 is an apocalyptic number.

86841974491 is a deficient number, since it is larger than the sum of its proper divisors (1570189349).

86841974491 is a wasteful number, since it uses less digits than its factorization.

86841974491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3714.

The product of its digits is 13934592, while the sum is 61.

The spelling of 86841974491 in words is "eighty-six billion, eight hundred forty-one million, nine hundred seventy-four thousand, four hundred ninety-one".