1812749455 has 12 divisors (see below), whose sum is σ = 2373467256. Its totient is φ = 1318133600.

The previous prime is 1812749443. The next prime is 1812749467. The reversal of 1812749455 is 5549472181.

It is an interprime number because it is at equal distance from previous prime (1812749443) and next prime (1812749467).

It is not a de Polignac number, because 1812749455 - 2⁹ = 1812748943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312885 + ... + 318625.

It is an arithmetic number, because the mean of its divisors is an integer number (197788938).

Almost surely, 2^1812749455 is an apocalyptic number.

1812749455 is a deficient number, since it is larger than the sum of its proper divisors (560717801).

1812749455 is an frugal number, since it uses more digits than its factorization.

1812749455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11498 (or 5757 counting only the distinct ones).

The product of its digits is 403200, while the sum is 46.

The square root of 1812749455 is about 42576.3955144162. The cubic root of 1812749455 is about 1219.3056729565.

The spelling of 1812749455 in words is "one billion, eight hundred twelve million, seven hundred forty-nine thousand, four hundred fifty-five".