866830872881545 has 32 divisors (see below), whose sum is σ = 1251855767885184. Its totient is φ = 567735042086400.

The previous prime is 866830872881509. The next prime is 866830872881579. The reversal of 866830872881545 is 545188278038668.

It is not a de Polignac number, because 866830872881545 - 2⁹ = 866830872881033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14784737407 + ... + 14784796036.

It is an arithmetic number, because the mean of its divisors is an integer number (39120492746412).

Almost surely, 2^{866830872881545} is an apocalyptic number.

It is an amenable number.

866830872881545 is a deficient number, since it is larger than the sum of its proper divisors (385024895003639).

866830872881545 is a wasteful number, since it uses less digits than its factorization.

866830872881545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29569533513.

The product of its (nonzero) digits is 4954521600, while the sum is 79.

The spelling of 866830872881545 in words is "eight hundred sixty-six trillion, eight hundred thirty billion, eight hundred seventy-two million, eight hundred eighty-one thousand, five hundred forty-five".