6921312452 has 12 divisors (see below), whose sum is σ = 12114130476. Its totient is φ = 3460132320.

The previous prime is 6921312439. The next prime is 6921312469. The reversal of 6921312452 is 2542131296.

It can be written as a sum of positive squares in 2 ways, for example, as 3104049796 + 3817262656 = 55714^2 + 61784^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100463 + ... + 154710.

It is an arithmetic number, because the mean of its divisors is an integer number (1009510873).

Almost surely, 2^6921312452 is an apocalyptic number.

It is an amenable number.

6921312452 is a deficient number, since it is larger than the sum of its proper divisors (5192818024).

6921312452 is a wasteful number, since it uses less digits than its factorization.

6921312452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261958 (or 261956 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 6921312452 is about 83194.4256065273. The cubic root of 6921312452 is about 1905.7363527706.

The spelling of 6921312452 in words is "six billion, nine hundred twenty-one million, three hundred twelve thousand, four hundred fifty-two".