812419016508 has 216 divisors, whose sum is σ = 2328610124400. Its totient is φ = 244765255680.

The previous prime is 812419016491. The next prime is 812419016569. The reversal of 812419016508 is 805610914218.

It is a happy number.

812419016508 is a `hidden beast` number, since 8 + 1 + 2 + 41 + 90 + 16 + 508 = 666.

It is a super-3 number, since 3×812419016508³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 486769098 + ... + 486770766.

Almost surely, 2^812419016508 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812419016508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1164305062200).

812419016508 is an abundant number, since it is smaller than the sum of its proper divisors (1516191107892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

812419016508 is a wasteful number, since it uses less digits than its factorization.

812419016508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090 (or 1878 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 812419016508 in words is "eight hundred twelve billion, four hundred nineteen million, sixteen thousand, five hundred eight".