1812758145 has 16 divisors (see below), whose sum is σ = 3164087232. Its totient is φ = 878912960.

The previous prime is 1812758117. The next prime is 1812758147. The reversal of 1812758145 is 5418572181.

It is not a de Polignac number, because 1812758145 - 2¹¹ = 1812756097 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1812758097 and 1812758106.

It is not an unprimeable number, because it can be changed into a prime (1812758147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5493042 + ... + 5493371.

It is an arithmetic number, because the mean of its divisors is an integer number (197755452).

Almost surely, 2^1812758145 is an apocalyptic number.

1812758145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1812758145 is a deficient number, since it is larger than the sum of its proper divisors (1351329087).

1812758145 is a wasteful number, since it uses less digits than its factorization.

1812758145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10986432.

The product of its digits is 89600, while the sum is 42.

The square root of 1812758145 is about 42576.4975661456. The cubic root of 1812758145 is about 1219.3076213319.

It can be divided in two parts, 181275 and 8145, that added together give a triangular number (189420 = T₆₁₅).

The spelling of 1812758145 in words is "one billion, eight hundred twelve million, seven hundred fifty-eight thousand, one hundred forty-five".