812061845 has 8 divisors (see below), whose sum is σ = 1113684864. Its totient is φ = 556842384.

The previous prime is 812061839. The next prime is 812061847. The reversal of 812061845 is 548160218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-812061845 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 23201767 = 812061845 / (8 + 1 + 2 + 0 + 6 + 1 + 8 + 4 + 5).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812061847) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 11600849 + ... + 11600918.

It is an arithmetic number, because the mean of its divisors is an integer number (139210608).

Almost surely, 2^812061845 is an apocalyptic number.

It is an amenable number.

812061845 is a deficient number, since it is larger than the sum of its proper divisors (301623019).

812061845 is a wasteful number, since it uses less digits than its factorization.

812061845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23201779.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 812061845 is about 28496.6988439012. The cubic root of 812061845 is about 932.9600238207.

The spelling of 812061845 in words is "eight hundred twelve million, sixty-one thousand, eight hundred forty-five".