86971215837 has 16 divisors (see below), whose sum is σ = 129922604352. Its totient is φ = 51285237120.

The previous prime is 86971215833. The next prime is 86971215907. The reversal of 86971215837 is 73851217968.

It is a happy number.

It is not a de Polignac number, because 86971215837 - 2² = 86971215833 is a prime.

It is a super-2 number, since 2×86971215837² (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 (86971215833) 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, 35613528 + ... + 35615969.

It is an arithmetic number, because the mean of its divisors is an integer number (8120162772).

Almost surely, 2^86971215837 is an apocalyptic number.

It is an amenable number.

86971215837 is a deficient number, since it is larger than the sum of its proper divisors (42951388515).

86971215837 is a wasteful number, since it uses less digits than its factorization.

86971215837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71229548.

The product of its digits is 5080320, while the sum is 57.

The spelling of 86971215837 in words is "eighty-six billion, nine hundred seventy-one million, two hundred fifteen thousand, eight hundred thirty-seven".