921294776272 has 30 divisors (see below), whose sum is σ = 1922345869542. Its totient is φ = 425206584576.

The previous prime is 921294776249. The next prime is 921294776317. The reversal of 921294776272 is 272677492129.

It can be written as a sum of positive squares in 3 ways, for example, as 47787708816 + 873507067456 = 218604^2 + 934616^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13809748 + ... + 13876300.

Almost surely, 2^921294776272 is an apocalyptic number.

It is an amenable number.

921294776272 is an abundant number, since it is smaller than the sum of its proper divisors (1001051093270).

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

921294776272 is an frugal number, since it uses more digits than its factorization.

921294776272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133127 (or 66568 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 58.

The spelling of 921294776272 in words is "nine hundred twenty-one billion, two hundred ninety-four million, seven hundred seventy-six thousand, two hundred seventy-two".