133126372561 has 16 divisors (see below), whose sum is σ = 164101158144. Its totient is φ = 105167911104.

The previous prime is 133126372541. The next prime is 133126372567. The reversal of 133126372561 is 165273621331.

It is a cyclic number.

It is not a de Polignac number, because 133126372561 - 2³¹ = 130978888913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133126372567) 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, 1071670 + ... + 1189423.

It is an arithmetic number, because the mean of its divisors is an integer number (10256322384).

Almost surely, 2^133126372561 is an apocalyptic number.

It is an amenable number.

133126372561 is a deficient number, since it is larger than the sum of its proper divisors (30974785583).

133126372561 is a wasteful number, since it uses less digits than its factorization.

133126372561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261760.

The product of its digits is 136080, while the sum is 40.

Adding to 133126372561 its reverse (165273621331), we get a palindrome (298399993892).

The spelling of 133126372561 in words is "one hundred thirty-three billion, one hundred twenty-six million, three hundred seventy-two thousand, five hundred sixty-one".