1945899702799 has 4 divisors (see below), whose sum is σ = 2095584295336. Its totient is φ = 1796215110264.

The previous prime is 1945899702793. The next prime is 1945899702809. The reversal of 1945899702799 is 9972079985491.

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 1945899702799 - 2⁵ = 1945899702767 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 (1945899702793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74842296249 + ... + 74842296274.

It is an arithmetic number, because the mean of its divisors is an integer number (523896073834).

Almost surely, 2^{1945899702799} is an apocalyptic number.

1945899702799 is a deficient number, since it is larger than the sum of its proper divisors (149684592537).

1945899702799 is a wasteful number, since it uses less digits than its factorization.

1945899702799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149684592536.

The product of its (nonzero) digits is 925888320, while the sum is 79.

The spelling of 1945899702799 in words is "one trillion, nine hundred forty-five billion, eight hundred ninety-nine million, seven hundred two thousand, seven hundred ninety-nine".