635772866225 has 12 divisors (see below), whose sum is σ = 900980976384. Its totient is φ = 435958536720.

The previous prime is 635772866191. The next prime is 635772866227. The reversal of 635772866225 is 522668277536.

It is not a de Polignac number, because 635772866225 - 2⁶ = 635772866161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (635772866227) 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, 1816493729 + ... + 1816494078.

It is an arithmetic number, because the mean of its divisors is an integer number (75081748032).

Almost surely, 2^635772866225 is an apocalyptic number.

It is an amenable number.

635772866225 is a deficient number, since it is larger than the sum of its proper divisors (265208110159).

635772866225 is a wasteful number, since it uses less digits than its factorization.

635772866225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632987824 (or 3632987819 counting only the distinct ones).

The product of its digits is 50803200, while the sum is 59.

The spelling of 635772866225 in words is "six hundred thirty-five billion, seven hundred seventy-two million, eight hundred sixty-six thousand, two hundred twenty-five".