1825540378 has 4 divisors (see below), whose sum is σ = 2738310570. Its totient is φ = 912770188.

The previous prime is 1825540333. The next prime is 1825540397. The reversal of 1825540378 is 8730455281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8730455281 = 17 ⋅513556193.

It can be written as a sum of positive squares in only one way, i.e., 1460997729 + 364542649 = 38223^2 + 19093^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456385093 + ... + 456385096.

Almost surely, 2^1825540378 is an apocalyptic number.

1825540378 is a deficient number, since it is larger than the sum of its proper divisors (912770192).

1825540378 is an equidigital number, since it uses as much as digits as its factorization.

1825540378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912770191.

The product of its (nonzero) digits is 268800, while the sum is 43.

The square root of 1825540378 is about 42726.3429045829. The cubic root of 1825540378 is about 1222.1667974750.

The spelling of 1825540378 in words is "one billion, eight hundred twenty-five million, five hundred forty thousand, three hundred seventy-eight".