1905195849379 has 4 divisors (see below), whose sum is σ = 1905201496240. Its totient is φ = 1905190202520.

The previous prime is 1905195849317. The next prime is 1905195849391. The reversal of 1905195849379 is 9739485915091.

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 1905195849379 - 2²¹ = 1905193752227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1905195849679) 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, 2282844 + ... + 3003625.

It is an arithmetic number, because the mean of its divisors is an integer number (476300374060).

Almost surely, 2^{1905195849379} is an apocalyptic number.

1905195849379 is a deficient number, since it is larger than the sum of its proper divisors (5646861).

1905195849379 is an equidigital number, since it uses as much as digits as its factorization.

1905195849379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5646860.

The product of its (nonzero) digits is 110224800, while the sum is 70.

The spelling of 1905195849379 in words is "one trillion, nine hundred five billion, one hundred ninety-five million, eight hundred forty-nine thousand, three hundred seventy-nine".