1918782325 has 6 divisors (see below), whose sum is σ = 2379290114. Its totient is φ = 1535025840.

The previous prime is 1918782319. The next prime is 1918782343. The reversal of 1918782325 is 5232878191.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 120428676 + 1798353649 = 10974^2 + 42407^2 .

It is not a de Polignac number, because 1918782325 - 2¹⁹ = 1918258037 is a prime.

It is a super-2 number, since 2×1918782325² = 7363451221464811250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38375622 + ... + 38375671.

Almost surely, 2^1918782325 is an apocalyptic number.

It is an amenable number.

1918782325 is a deficient number, since it is larger than the sum of its proper divisors (460507789).

1918782325 is an equidigital number, since it uses as much as digits as its factorization.

1918782325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76751303 (or 76751298 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The square root of 1918782325 is about 43803.9076453232. The cubic root of 1918782325 is about 1242.6301968618.

The spelling of 1918782325 in words is "one billion, nine hundred eighteen million, seven hundred eighty-two thousand, three hundred twenty-five".