812628178630 has 8 divisors (see below), whose sum is σ = 1462730721552. Its totient is φ = 325051271448.

The previous prime is 812628178627. The next prime is 812628178631. The reversal of 812628178630 is 36871826218.

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

It is a super-2 number, since 2×812628178630² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812628178631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40631408922 + ... + 40631408941.

It is an arithmetic number, because the mean of its divisors is an integer number (182841340194).

Almost surely, 2^812628178630 is an apocalyptic number.

812628178630 is a deficient number, since it is larger than the sum of its proper divisors (650102542922).

812628178630 is a wasteful number, since it uses less digits than its factorization.

812628178630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81262817870.

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 812628178630 in words is "eight hundred twelve billion, six hundred twenty-eight million, one hundred seventy-eight thousand, six hundred thirty".