1945393225815 has 32 divisors (see below), whose sum is σ = 3381726479040. Its totient is φ = 949256534016.

The previous prime is 1945393225813. The next prime is 1945393225873. The reversal of 1945393225815 is 5185223935491.

It is not a de Polignac number, because 1945393225815 - 2¹ = 1945393225813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945393225813) 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, 44121220 + ... + 44165289.

It is an arithmetic number, because the mean of its divisors is an integer number (105678952470).

Almost surely, 2^{1945393225815} is an apocalyptic number.

1945393225815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1945393225815 is a deficient number, since it is larger than the sum of its proper divisors (1436333253225).

1945393225815 is a wasteful number, since it uses less digits than its factorization.

1945393225815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88286643.

The product of its digits is 11664000, while the sum is 57.

The spelling of 1945393225815 in words is "one trillion, nine hundred forty-five billion, three hundred ninety-three million, two hundred twenty-five thousand, eight hundred fifteen".