641536274 has 12 divisors (see below), whose sum is σ = 980812266. Its totient is φ = 314713152.

The previous prime is 641536267. The next prime is 641536279. The reversal of 641536274 is 472635146.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 640444249 + 1092025 = 25307^2 + 1045^2 .

It is not an unprimeable number, because it can be changed into a prime (641536279) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51479 + ... + 62714.

Almost surely, 2^641536274 is an apocalyptic number.

641536274 is a deficient number, since it is larger than the sum of its proper divisors (339275992).

641536274 is a wasteful number, since it uses less digits than its factorization.

641536274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114301 (or 114248 counting only the distinct ones).

The product of its digits is 120960, while the sum is 38.

The square root of 641536274 is about 25328.5663629034. The cubic root of 641536274 is about 862.4628670984.

The spelling of 641536274 in words is "six hundred forty-one million, five hundred thirty-six thousand, two hundred seventy-four".