133561936989799 has 16 divisors (see below), whose sum is σ = 138243850264800. Its totient is φ = 128885132059264.

The previous prime is 133561936989769. The next prime is 133561936989853. The reversal of 133561936989799 is 997989639165331.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 133561936989799 - 2³¹ = 133559789506151 is a prime.

It is a super-2 number, since 2×133561936989799² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133561936989769) 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, 387011829 + ... + 387356785.

It is an arithmetic number, because the mean of its divisors is an integer number (8640240641550).

Almost surely, 2^{133561936989799} is an apocalyptic number.

133561936989799 is a deficient number, since it is larger than the sum of its proper divisors (4681913275001).

133561936989799 is a wasteful number, since it uses less digits than its factorization.

133561936989799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352322.

The product of its digits is 16070775840, while the sum is 88.

The spelling of 133561936989799 in words is "one hundred thirty-three trillion, five hundred sixty-one billion, nine hundred thirty-six million, nine hundred eighty-nine thousand, seven hundred ninety-nine".