1918518525 has 108 divisors (see below), whose sum is σ = 4317077856. Its totient is φ = 797227200.

The previous prime is 1918518499. The next prime is 1918518587. The reversal of 1918518525 is 5258158191.

It is a happy number.

It is not a de Polignac number, because 1918518525 - 2⁹ = 1918518013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 185542 + ... + 195608.

Almost surely, 2^1918518525 is an apocalyptic number.

1918518525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1918518525 is an abundant number, since it is smaller than the sum of its proper divisors (2398559331).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1918518525 is a wasteful number, since it uses less digits than its factorization.

1918518525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10112 (or 10093 counting only the distinct ones).

The product of its digits is 144000, while the sum is 45.

The square root of 1918518525 is about 43800.8963949369. The cubic root of 1918518525 is about 1242.5732473987.

The spelling of 1918518525 in words is "one billion, nine hundred eighteen million, five hundred eighteen thousand, five hundred twenty-five".