1818141272 has 8 divisors (see below), whose sum is σ = 3409014900. Its totient is φ = 909070632.

The previous prime is 1818141257. The next prime is 1818141277. The reversal of 1818141272 is 2721418181.

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818141277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113633822 + ... + 113633837.

Almost surely, 2^1818141272 is an apocalyptic number.

It is an amenable number.

1818141272 is a deficient number, since it is larger than the sum of its proper divisors (1590873628).

1818141272 is a wasteful number, since it uses less digits than its factorization.

1818141272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227267665 (or 227267661 counting only the distinct ones).

The product of its digits is 7168, while the sum is 35.

The square root of 1818141272 is about 42639.6678223459. The cubic root of 1818141272 is about 1220.5133716899.

The spelling of 1818141272 in words is "one billion, eight hundred eighteen million, one hundred forty-one thousand, two hundred seventy-two".