694972420816 has 10 divisors (see below), whose sum is σ = 1346509065362. Its totient is φ = 347486210400.

The previous prime is 694972420781. The next prime is 694972420817. The reversal of 694972420816 is 618024279496.

It can be written as a sum of positive squares in only one way, i.e., 627891420816 + 67081000000 = 792396^2 + 259000^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694972420817) by changing a digit.

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 as a sum of consecutive naturals, namely, 21717888135 + ... + 21717888166.

Almost surely, 2^694972420816 is an apocalyptic number.

It is an amenable number.

694972420816 is a deficient number, since it is larger than the sum of its proper divisors (651536644546).

694972420816 is a wasteful number, since it uses less digits than its factorization.

694972420816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43435776309 (or 43435776303 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 694972420816 in words is "six hundred ninety-four billion, nine hundred seventy-two million, four hundred twenty thousand, eight hundred sixteen".