819748274972 has 24 divisors (see below), whose sum is σ = 1577907658992. Its totient is φ = 372612849840.

The previous prime is 819748274929. The next prime is 819748274977. The reversal of 819748274972 is 279472847918.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819748274977) 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, 76980803 + ... + 76991450.

It is an arithmetic number, because the mean of its divisors is an integer number (65746152458).

Almost surely, 2^819748274972 is an apocalyptic number.

It is an amenable number.

819748274972 is a deficient number, since it is larger than the sum of its proper divisors (758159384020).

819748274972 is a wasteful number, since it uses less digits than its factorization.

819748274972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153972290 (or 153972266 counting only the distinct ones).

The product of its digits is 113799168, while the sum is 68.

The spelling of 819748274972 in words is "eight hundred nineteen billion, seven hundred forty-eight million, two hundred seventy-four thousand, nine hundred seventy-two".