1818273572 has 6 divisors (see below), whose sum is σ = 3181978758. Its totient is φ = 909136784.

The previous prime is 1818273563. The next prime is 1818273601. The reversal of 1818273572 is 2753728181.

It can be written as a sum of positive squares in only one way, i.e., 1010349796 + 807923776 = 31786^2 + 28424^2 .

It is a super-2 number, since 2×1818273572² = 6612237565267278368, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227284193 + ... + 227284200.

It is an arithmetic number, because the mean of its divisors is an integer number (530329793).

Almost surely, 2^1818273572 is an apocalyptic number.

It is an amenable number.

1818273572 is a deficient number, since it is larger than the sum of its proper divisors (1363705186).

1818273572 is a wasteful number, since it uses less digits than its factorization.

1818273572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454568397 (or 454568395 counting only the distinct ones).

The product of its digits is 188160, while the sum is 44.

The square root of 1818273572 is about 42641.2191664357. The cubic root of 1818273572 is about 1220.5429751839.

The spelling of 1818273572 in words is "one billion, eight hundred eighteen million, two hundred seventy-three thousand, five hundred seventy-two".