1915194181225 has 24 divisors (see below), whose sum is σ = 2568221873280. Its totient is φ = 1408379622720.

The previous prime is 1915194181183. The next prime is 1915194181253. The reversal of 1915194181225 is 5221814915191.

It is not a de Polignac number, because 1915194181225 - 2³³ = 1906604246633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12250579 + ... + 12405928.

It is an arithmetic number, because the mean of its divisors is an integer number (107009244720).

Almost surely, 2^{1915194181225} is an apocalyptic number.

It is an amenable number.

1915194181225 is a deficient number, since it is larger than the sum of its proper divisors (653027692055).

1915194181225 is a wasteful number, since it uses less digits than its factorization.

1915194181225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24656769 (or 24656764 counting only the distinct ones).

The product of its digits is 259200, while the sum is 49.

The spelling of 1915194181225 in words is "one trillion, nine hundred fifteen billion, one hundred ninety-four million, one hundred eighty-one thousand, two hundred twenty-five".