345500866881 has 16 divisors (see below), whose sum is σ = 518172313920. Its totient is φ = 230333909796.

The previous prime is 345500866859. The next prime is 345500866889. The reversal of 345500866881 is 188668005543.

345500866881 is a `hidden beast` number, since 3 + 4 + 550 + 0 + 8 + 6 + 6 + 8 + 81 = 666.

It is not a de Polignac number, because 345500866881 - 2⁵ = 345500866849 is a prime.

It is a super-2 number, since 2×345500866881² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (345500866889) 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 15 ways as a sum of consecutive naturals, for example, 78987495 + ... + 78991868.

It is an arithmetic number, because the mean of its divisors is an integer number (32385769620).

Almost surely, 2^345500866881 is an apocalyptic number.

It is an amenable number.

345500866881 is a deficient number, since it is larger than the sum of its proper divisors (172671447039).

345500866881 is an frugal number, since it uses more digits than its factorization.

345500866881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157979384 (or 157979366 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 345500866881 in words is "three hundred forty-five billion, five hundred million, eight hundred sixty-six thousand, eight hundred eighty-one".