694921980672 has 720 divisors, whose sum is σ = 2243723328000. Its totient is φ = 213264949248.

The previous prime is 694921980659. The next prime is 694921980689. The reversal of 694921980672 is 276089129496.

694921980672 is a `hidden beast` number, since 6 + 9 + 492 + 1 + 9 + 80 + 67 + 2 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2583352954 + ... + 2583353222.

It is an arithmetic number, because the mean of its divisors is an integer number (3116282400).

Almost surely, 2^694921980672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 694921980672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1121861664000).

694921980672 is an abundant number, since it is smaller than the sum of its proper divisors (1548801347328).

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

694921980672 is a wasteful number, since it uses less digits than its factorization.

694921980672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The spelling of 694921980672 in words is "six hundred ninety-four billion, nine hundred twenty-one million, nine hundred eighty thousand, six hundred seventy-two".