133634572321 has 8 divisors (see below), whose sum is σ = 134234797320. Its totient is φ = 133034575872.

The previous prime is 133634572303. The next prime is 133634572381. The reversal of 133634572321 is 123275436331.

It can be written as a sum of positive squares in 4 ways, for example, as 5012640000 + 128621932321 = 70800^2 + 358639^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133634572321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133634572381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1174225 + ... + 1282993.

It is an arithmetic number, because the mean of its divisors is an integer number (16779349665).

Almost surely, 2^133634572321 is an apocalyptic number.

It is an amenable number.

133634572321 is a deficient number, since it is larger than the sum of its proper divisors (600224999).

133634572321 is a wasteful number, since it uses less digits than its factorization.

133634572321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114275.

The product of its digits is 272160, while the sum is 40.

The spelling of 133634572321 in words is "one hundred thirty-three billion, six hundred thirty-four million, five hundred seventy-two thousand, three hundred twenty-one".