694385128225 has 12 divisors (see below), whose sum is σ = 861049016320. Its totient is φ = 555500710800.

The previous prime is 694385128223. The next prime is 694385128247. The reversal of 694385128225 is 522821583496.

It is not a de Polignac number, because 694385128225 - 2¹ = 694385128223 is a prime.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (694385128223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2491660 + ... + 2756290.

Almost surely, 2^694385128225 is an apocalyptic number.

It is an amenable number.

694385128225 is a deficient number, since it is larger than the sum of its proper divisors (166663888095).

694385128225 is a wasteful number, since it uses less digits than its factorization.

694385128225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369600 (or 369595 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 55.

The spelling of 694385128225 in words is "six hundred ninety-four billion, three hundred eighty-five million, one hundred twenty-eight thousand, two hundred twenty-five".