345807758021 has 16 divisors (see below), whose sum is σ = 390279133440. Its totient is φ = 303510204480.

The previous prime is 345807758011. The next prime is 345807758027. The reversal of 345807758021 is 120857708543.

It is a de Polignac number, because none of the positive numbers 2^k-345807758021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345807758027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6851540 + ... + 6901826.

It is an arithmetic number, because the mean of its divisors is an integer number (24392445840).

Almost surely, 2^345807758021 is an apocalyptic number.

It is an amenable number.

345807758021 is a deficient number, since it is larger than the sum of its proper divisors (44471375419).

345807758021 is a wasteful number, since it uses less digits than its factorization.

345807758021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71884.

The product of its (nonzero) digits is 1881600, while the sum is 50.

The spelling of 345807758021 in words is "three hundred forty-five billion, eight hundred seven million, seven hundred fifty-eight thousand, twenty-one".