812161415 has 16 divisors (see below), whose sum is σ = 1075165056. Its totient is φ = 585120000.

The previous prime is 812161411. The next prime is 812161421. The reversal of 812161415 is 514161218.

It is not a de Polignac number, because 812161415 - 2² = 812161411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812161411) 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 15 ways as a sum of consecutive naturals, for example, 149711 + ... + 155040.

It is an arithmetic number, because the mean of its divisors is an integer number (67197816).

Almost surely, 2^812161415 is an apocalyptic number.

812161415 is a deficient number, since it is larger than the sum of its proper divisors (263003641).

812161415 is a wasteful number, since it uses less digits than its factorization.

812161415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304810.

The product of its digits is 1920, while the sum is 29.

The square root of 812161415 is about 28498.4458348170. The cubic root of 812161415 is about 932.9981535246.

The spelling of 812161415 in words is "eight hundred twelve million, one hundred sixty-one thousand, four hundred fifteen".