1345785811899 has 8 divisors (see below), whose sum is σ = 1812147232272. Its totient is φ = 888307466400.

The previous prime is 1345785811801. The next prime is 1345785811919. The reversal of 1345785811899 is 9981185875431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1345785811899 - 2⁹ = 1345785811387 is a prime.

It is a super-2 number, since 2×1345785811899² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1345785811499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2220768364 + ... + 2220768969.

It is an arithmetic number, because the mean of its divisors is an integer number (226518404034).

Almost surely, 2^{1345785811899} is an apocalyptic number.

1345785811899 is a deficient number, since it is larger than the sum of its proper divisors (466361420373).

1345785811899 is a wasteful number, since it uses less digits than its factorization.

1345785811899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4441537437.

The product of its digits is 87091200, while the sum is 69.

The spelling of 1345785811899 in words is "one trillion, three hundred forty-five billion, seven hundred eighty-five million, eight hundred eleven thousand, eight hundred ninety-nine".