635390801252 has 24 divisors (see below), whose sum is σ = 1132974747576. Its totient is φ = 311684375808.

The previous prime is 635390801233. The next prime is 635390801257. The reversal of 635390801252 is 252108093536.

635390801252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 16865177956 + 618525623296 = 129866^2 + 786464^2 .

It is not an unprimeable number, because it can be changed into a prime (635390801257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4473878 + ... + 4613714.

It is an arithmetic number, because the mean of its divisors is an integer number (47207281149).

Almost surely, 2^635390801252 is an apocalyptic number.

It is an amenable number.

635390801252 is a deficient number, since it is larger than the sum of its proper divisors (497583946324).

635390801252 is a wasteful number, since it uses less digits than its factorization.

635390801252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161327 (or 161325 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 44.

Adding to 635390801252 its reverse (252108093536), we get a palindrome (887498894788).

The spelling of 635390801252 in words is "six hundred thirty-five billion, three hundred ninety million, eight hundred one thousand, two hundred fifty-two".