812149746390 has 24 divisors (see below), whose sum is σ = 2111589340848. Its totient is φ = 216573265680.

The previous prime is 812149746379. The next prime is 812149746407. The reversal of 812149746390 is 93647941218.

812149746390 is a `hidden beast` number, since 8 + 1 + 2 + 1 + 4 + 97 + 463 + 90 = 666.

It is a super-2 number, since 2×812149746390² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4511942946 + ... + 4511943125.

It is an arithmetic number, because the mean of its divisors is an integer number (87982889202).

Almost surely, 2^812149746390 is an apocalyptic number.

812149746390 is an abundant number, since it is smaller than the sum of its proper divisors (1299439594458).

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

812149746390 is a wasteful number, since it uses less digits than its factorization.

812149746390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9023886084 (or 9023886081 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 812149746390 in words is "eight hundred twelve billion, one hundred forty-nine million, seven hundred forty-six thousand, three hundred ninety".