345811588991 has 4 divisors (see below), whose sum is σ = 377249006184. Its totient is φ = 314374171800.

The previous prime is 345811588937. The next prime is 345811588999. The reversal of 345811588991 is 199885118543.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345811588991 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 (345811588999) 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, 15718708580 + ... + 15718708601.

It is an arithmetic number, because the mean of its divisors is an integer number (94312251546).

Almost surely, 2^345811588991 is an apocalyptic number.

345811588991 is a deficient number, since it is larger than the sum of its proper divisors (31437417193).

345811588991 is a wasteful number, since it uses less digits than its factorization.

345811588991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31437417192.

The product of its digits is 12441600, while the sum is 62.

The spelling of 345811588991 in words is "three hundred forty-five billion, eight hundred eleven million, five hundred eighty-eight thousand, nine hundred ninety-one".