133631541537 has 16 divisors (see below), whose sum is σ = 191889864768. Its totient is φ = 82231076160.

The previous prime is 133631541499. The next prime is 133631541541. The reversal of 133631541537 is 735145136331.

It is a happy number.

It is not a de Polignac number, because 133631541537 - 2¹⁹ = 133631017249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133631541037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 978087 + ... + 1106307.

It is an arithmetic number, because the mean of its divisors is an integer number (11993116548).

Almost surely, 2^133631541537 is an apocalyptic number.

It is an amenable number.

133631541537 is a deficient number, since it is larger than the sum of its proper divisors (58258323231).

133631541537 is a wasteful number, since it uses less digits than its factorization.

133631541537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154960.

The product of its digits is 340200, while the sum is 42.

Adding to 133631541537 its reverse (735145136331), we get a palindrome (868776677868).

The spelling of 133631541537 in words is "one hundred thirty-three billion, six hundred thirty-one million, five hundred forty-one thousand, five hundred thirty-seven".