345742687891 has 4 divisors (see below), whose sum is σ = 345812216832. Its totient is φ = 345673158952.

The previous prime is 345742687883. The next prime is 345742687897. The reversal of 345742687891 is 198786247543.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 345742687891 - 2³ = 345742687883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345742687897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34757011 + ... + 34766956.

It is an arithmetic number, because the mean of its divisors is an integer number (86453054208).

Almost surely, 2^345742687891 is an apocalyptic number.

345742687891 is a deficient number, since it is larger than the sum of its proper divisors (69528941).

345742687891 is an equidigital number, since it uses as much as digits as its factorization.

345742687891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69528940.

The product of its digits is 81285120, while the sum is 64.

The spelling of 345742687891 in words is "three hundred forty-five billion, seven hundred forty-two million, six hundred eighty-seven thousand, eight hundred ninety-one".