133621233655 has 16 divisors (see below), whose sum is σ = 197348284224. Its totient is φ = 84577835520.

The previous prime is 133621233631. The next prime is 133621233667. The reversal of 133621233655 is 556332126331.

It is not a de Polignac number, because 133621233655 - 2³⁵ = 99261495287 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146836066 + ... + 146836975.

It is an arithmetic number, because the mean of its divisors is an integer number (12334267764).

Almost surely, 2^133621233655 is an apocalyptic number.

133621233655 is a deficient number, since it is larger than the sum of its proper divisors (63727050569).

133621233655 is a wasteful number, since it uses less digits than its factorization.

133621233655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293673066.

The product of its digits is 291600, while the sum is 40.

Adding to 133621233655 its reverse (556332126331), we get a palindrome (689953359986).

The spelling of 133621233655 in words is "one hundred thirty-three billion, six hundred twenty-one million, two hundred thirty-three thousand, six hundred fifty-five".