1819136412 has 18 divisors (see below), whose sum is σ = 4598372688. Its totient is φ = 606378792.

The previous prime is 1819136393. The next prime is 1819136453. The reversal of 1819136412 is 2146319181.

1819136412 is a `hidden beast` number, since 1 + 8 + 1 + 9 + 1 + 3 + 641 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 50531567 = 1819136412 / (1 + 8 + 1 + 9 + 1 + 3 + 6 + 4 + 1 + 2).

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 5 ways as a sum of consecutive naturals, for example, 25265748 + ... + 25265819.

Almost surely, 2^1819136412 is an apocalyptic number.

1819136412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1819136412 is an abundant number, since it is smaller than the sum of its proper divisors (2779236276).

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

1819136412 is a wasteful number, since it uses less digits than its factorization.

1819136412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50531577 (or 50531572 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1819136412 is about 42651.3354069952. The cubic root of 1819136412 is about 1220.7360093486.

The spelling of 1819136412 in words is "one billion, eight hundred nineteen million, one hundred thirty-six thousand, four hundred twelve".