133272720637 has 4 divisors (see below), whose sum is σ = 152311680736. Its totient is φ = 114233760540.

The previous prime is 133272720571. The next prime is 133272720641. The reversal of 133272720637 is 736027272331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133272720637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133272720593 and 133272720602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133272720677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9519480039 + ... + 9519480052.

It is an arithmetic number, because the mean of its divisors is an integer number (38077920184).

Almost surely, 2^133272720637 is an apocalyptic number.

It is an amenable number.

133272720637 is a deficient number, since it is larger than the sum of its proper divisors (19038960099).

133272720637 is an equidigital number, since it uses as much as digits as its factorization.

133272720637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19038960098.

The product of its (nonzero) digits is 444528, while the sum is 43.

Adding to 133272720637 its reverse (736027272331), we get a palindrome (869299992968).

The spelling of 133272720637 in words is "one hundred thirty-three billion, two hundred seventy-two million, seven hundred twenty thousand, six hundred thirty-seven".