812180337078 has 64 divisors (see below), whose sum is σ = 1795946390784. Its totient is φ = 242802000000.

The previous prime is 812180337071. The next prime is 812180337083. The reversal of 812180337078 is 870733081218.

It is a super-2 number, since 2×812180337078² (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 (812180337071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3734328 + ... + 3945828.

It is an arithmetic number, because the mean of its divisors is an integer number (28061662356).

Almost surely, 2^812180337078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812180337078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (897973195392).

812180337078 is an abundant number, since it is smaller than the sum of its proper divisors (983766053706).

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

812180337078 is a wasteful number, since it uses less digits than its factorization.

812180337078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212301.

The product of its (nonzero) digits is 451584, while the sum is 48.

The spelling of 812180337078 in words is "eight hundred twelve billion, one hundred eighty million, three hundred thirty-seven thousand, seventy-eight".