86956797897 has 24 divisors (see below), whose sum is σ = 129097842120. Its totient is φ = 56380135680.

The previous prime is 86956797857. The next prime is 86956797913. The reversal of 86956797897 is 79879765968.

It can be written as a sum of positive squares in 4 ways, for example, as 8052549696 + 78904248201 = 89736^2 + 280899^2 .

It is not a de Polignac number, because 86956797897 - 2⁶ = 86956797833 is a prime.

It is a super-2 number, since 2×86956797897² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86956797857) 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, 840978 + ... + 938699.

It is an arithmetic number, because the mean of its divisors is an integer number (5379076755).

Almost surely, 2^86956797897 is an apocalyptic number.

It is an amenable number.

86956797897 is a deficient number, since it is larger than the sum of its proper divisors (42141044223).

86956797897 is a wasteful number, since it uses less digits than its factorization.

86956797897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779833 (or 1779830 counting only the distinct ones).

The product of its digits is 2880541440, while the sum is 81.

The spelling of 86956797897 in words is "eighty-six billion, nine hundred fifty-six million, seven hundred ninety-seven thousand, eight hundred ninety-seven".