637540052 has 24 divisors (see below), whose sum is σ = 1186649856. Its totient is φ = 298666368.

The previous prime is 637540009. The next prime is 637540067. The reversal of 637540052 is 250045736.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5858 + ... + 36185.

It is an arithmetic number, because the mean of its divisors is an integer number (49443744).

Almost surely, 2^637540052 is an apocalyptic number.

It is an amenable number.

637540052 is a deficient number, since it is larger than the sum of its proper divisors (549109804).

637540052 is a wasteful number, since it uses less digits than its factorization.

637540052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42287 (or 42285 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 637540052 is about 25249.5554812357. Note that the first 3 decimals coincide. The cubic root of 637540052 is about 860.6683339158.

Adding to 637540052 its reverse (250045736), we get a palindrome (887585788).

The spelling of 637540052 in words is "six hundred thirty-seven million, five hundred forty thousand, fifty-two".