1945111299 has 32 divisors (see below), whose sum is σ = 2694021120. Its totient is φ = 1247500800.

The previous prime is 1945111279. The next prime is 1945111319. The reversal of 1945111299 is 9921115491.

It is an interprime number because it is at equal distance from previous prime (1945111279) and next prime (1945111319).

It is not a de Polignac number, because 1945111299 - 2⁹ = 1945110787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1945111299.

It is not an unprimeable number, because it can be changed into a prime (1945111249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3733159 + ... + 3733679.

It is an arithmetic number, because the mean of its divisors is an integer number (84188160).

Almost surely, 2^1945111299 is an apocalyptic number.

1945111299 is a deficient number, since it is larger than the sum of its proper divisors (748909821).

1945111299 is a wasteful number, since it uses less digits than its factorization.

1945111299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931.

The product of its digits is 29160, while the sum is 42.

The square root of 1945111299 is about 44103.4159561365. The cubic root of 1945111299 is about 1248.2880669519.

The spelling of 1945111299 in words is "one billion, nine hundred forty-five million, one hundred eleven thousand, two hundred ninety-nine".