812318691954 has 384 divisors, whose sum is σ = 2287363276800. Its totient is φ = 185965528320.

The previous prime is 812318691949. The next prime is 812318692021. The reversal of 812318691954 is 459196813218.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 812318691894 and 812318691903.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 276391417 + ... + 276394355.

It is an arithmetic number, because the mean of its divisors is an integer number (5956675200).

Almost surely, 2^812318691954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812318691954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1143681638400).

812318691954 is an abundant number, since it is smaller than the sum of its proper divisors (1475044584846).

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

812318691954 is a wasteful number, since it uses less digits than its factorization.

812318691954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3078 (or 3041 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 57.

The spelling of 812318691954 in words is "eight hundred twelve billion, three hundred eighteen million, six hundred ninety-one thousand, nine hundred fifty-four".