133557023437 has 16 divisors (see below), whose sum is σ = 142512832000. Its totient is φ = 124804286784.

The previous prime is 133557023419. The next prime is 133557023519. The reversal of 133557023437 is 734320755331.

It is a cyclic number.

It is not a de Polignac number, because 133557023437 - 2²³ = 133548634829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133557023393 and 133557023402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133558023437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317239 + ... + 606427.

It is an arithmetic number, because the mean of its divisors is an integer number (8907052000).

Almost surely, 2^133557023437 is an apocalyptic number.

It is an amenable number.

133557023437 is a deficient number, since it is larger than the sum of its proper divisors (8955808563).

133557023437 is a wasteful number, since it uses less digits than its factorization.

133557023437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289540.

The product of its (nonzero) digits is 793800, while the sum is 43.

Adding to 133557023437 its reverse (734320755331), we get a palindrome (867877778768).

The spelling of 133557023437 in words is "one hundred thirty-three billion, five hundred fifty-seven million, twenty-three thousand, four hundred thirty-seven".