812250721149 has 8 divisors (see below), whose sum is σ = 1237715384640. Its totient is φ = 464143269216.

The previous prime is 812250721147. The next prime is 812250721151. The reversal of 812250721149 is 941127052218.

It is an interprime number because it is at equal distance from previous prime (812250721147) and next prime (812250721151).

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

It is not a de Polignac number, because 812250721149 - 2¹ = 812250721147 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 812250721149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812250721147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19339302864 + ... + 19339302905.

It is an arithmetic number, because the mean of its divisors is an integer number (154714423080).

Almost surely, 2^812250721149 is an apocalyptic number.

It is an amenable number.

812250721149 is a deficient number, since it is larger than the sum of its proper divisors (425464663491).

812250721149 is a wasteful number, since it uses less digits than its factorization.

812250721149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38678605779.

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 812250721149 in words is "eight hundred twelve billion, two hundred fifty million, seven hundred twenty-one thousand, one hundred forty-nine".