86991801255 has 20 divisors (see below), whose sum is σ = 155940859272. Its totient is φ = 46395627120.

The previous prime is 86991801229. The next prime is 86991801257. The reversal of 86991801255 is 55210819968.

It is not a de Polignac number, because 86991801255 - 2⁶ = 86991801191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86991801257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 107396881 + ... + 107397690.

Almost surely, 2^86991801255 is an apocalyptic number.

86991801255 is a deficient number, since it is larger than the sum of its proper divisors (68949058017).

86991801255 is a wasteful number, since it uses less digits than its factorization.

86991801255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214794588 (or 214794579 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 54.

The spelling of 86991801255 in words is "eighty-six billion, nine hundred ninety-one million, eight hundred one thousand, two hundred fifty-five".