133550637638 has 12 divisors (see below), whose sum is σ = 220192993860. Its totient is φ = 60704835180.

The previous prime is 133550637631. The next prime is 133550637673. The reversal of 133550637638 is 836736055331.

133550637638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133550637631) 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, 275930828 + ... + 275931311.

It is an arithmetic number, because the mean of its divisors is an integer number (18349416155).

Almost surely, 2^133550637638 is an apocalyptic number.

133550637638 is a deficient number, since it is larger than the sum of its proper divisors (86642356222).

133550637638 is a wasteful number, since it uses less digits than its factorization.

133550637638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551862163 (or 551862152 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 50.

The spelling of 133550637638 in words is "one hundred thirty-three billion, five hundred fifty million, six hundred thirty-seven thousand, six hundred thirty-eight".