86866917512 has 8 divisors (see below), whose sum is σ = 162875470350. Its totient is φ = 43433458752.

The previous prime is 86866917469. The next prime is 86866917593. The reversal of 86866917512 is 21571966868.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 56355911236 + 30511006276 = 237394^2 + 174674^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×86866917512² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5429182337 + ... + 5429182352.

Almost surely, 2^86866917512 is an apocalyptic number.

It is an amenable number.

86866917512 is a deficient number, since it is larger than the sum of its proper divisors (76008552838).

86866917512 is a wasteful number, since it uses less digits than its factorization.

86866917512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10858364695 (or 10858364691 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 59.

The spelling of 86866917512 in words is "eighty-six billion, eight hundred sixty-six million, nine hundred seventeen thousand, five hundred twelve".