86721953913 has 32 divisors (see below), whose sum is σ = 146853446400. Its totient is φ = 49547766528.

The previous prime is 86721953909. The next prime is 86721953917. The reversal of 86721953913 is 31935912768.

86721953913 is a `hidden beast` number, since 8 + 67 + 2 + 195 + 391 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (86721953909) and next prime (86721953917).

It is not a de Polignac number, because 86721953913 - 2² = 86721953909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86721953913.

It is not an unprimeable number, because it can be changed into a prime (86721953917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1334545 + ... + 1398017.

It is an arithmetic number, because the mean of its divisors is an integer number (4589170200).

Almost surely, 2^86721953913 is an apocalyptic number.

It is an amenable number.

86721953913 is a deficient number, since it is larger than the sum of its proper divisors (60131492487).

86721953913 is a wasteful number, since it uses less digits than its factorization.

86721953913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70718 (or 70712 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The spelling of 86721953913 in words is "eighty-six billion, seven hundred twenty-one million, nine hundred fifty-three thousand, nine hundred thirteen".