812406544551 has 36 divisors (see below), whose sum is σ = 1372954730472. Its totient is φ = 461548844064.

The previous prime is 812406544541. The next prime is 812406544577. The reversal of 812406544551 is 155445604218.

812406544551 is a `hidden beast` number, since 8 + 1 + 2 + 40 + 6 + 54 + 4 + 551 = 666.

812406544551 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 812406544551 - 2⁵ = 812406544519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 812406544497 and 812406544506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812406544541) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5247961 + ... + 5400546.

It is an arithmetic number, because the mean of its divisors is an integer number (38137631402).

Almost surely, 2^812406544551 is an apocalyptic number.

812406544551 is a deficient number, since it is larger than the sum of its proper divisors (560548185921).

812406544551 is a wasteful number, since it uses less digits than its factorization.

812406544551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10648700 (or 10648690 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 45.

The spelling of 812406544551 in words is "eight hundred twelve billion, four hundred six million, five hundred forty-four thousand, five hundred fifty-one".