1918153744 has 20 divisors (see below), whose sum is σ = 4002301996. Its totient is φ = 885301632.

The previous prime is 1918153739. The next prime is 1918153751. The reversal of 1918153744 is 4473518191.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1123590400 + 794563344 = 33520^2 + 28188^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1918153744.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4610739 + ... + 4611154.

Almost surely, 2^1918153744 is an apocalyptic number.

It is an amenable number.

1918153744 is an abundant number, since it is smaller than the sum of its proper divisors (2084148252).

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

1918153744 is a wasteful number, since it uses less digits than its factorization.

1918153744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9221914 (or 9221908 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 1918153744 is about 43796.7321155357. The cubic root of 1918153744 is about 1242.4944894341.

The spelling of 1918153744 in words is "one billion, nine hundred eighteen million, one hundred fifty-three thousand, seven hundred forty-four".