636545152 has 16 divisors (see below), whose sum is σ = 1268117550. Its totient is φ = 318272512.

The previous prime is 636545149. The next prime is 636545167. The reversal of 636545152 is 251545636.

It can be written as a sum of positive squares in only one way, i.e., 345365056 + 291180096 = 18584^2 + 17064^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2486377 + ... + 2486632.

Almost surely, 2^636545152 is an apocalyptic number.

It is an amenable number.

636545152 is a deficient number, since it is larger than the sum of its proper divisors (631572398).

636545152 is an equidigital number, since it uses as much as digits as its factorization.

636545152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4973023 (or 4973011 counting only the distinct ones).

The product of its digits is 108000, while the sum is 37.

The square root of 636545152 is about 25229.8464521685. The cubic root of 636545152 is about 860.2204014157.

The spelling of 636545152 in words is "six hundred thirty-six million, five hundred forty-five thousand, one hundred fifty-two".