161633133534 has 64 divisors (see below), whose sum is σ = 328339630080. Its totient is φ = 53040524160.

The previous prime is 161633133521. The next prime is 161633133611. The reversal of 161633133534 is 435331336161.

It is a super-2 number, since 2×161633133534² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161633133492 and 161633133501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55561672 + ... + 55564580.

It is an arithmetic number, because the mean of its divisors is an integer number (5130306720).

Almost surely, 2^161633133534 is an apocalyptic number.

161633133534 is an abundant number, since it is smaller than the sum of its proper divisors (166706496546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161633133534 is a wasteful number, since it uses less digits than its factorization.

161633133534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3585.

The product of its digits is 174960, while the sum is 39.

Adding to 161633133534 its reverse (435331336161), we get a palindrome (596964469695).

The spelling of 161633133534 in words is "one hundred sixty-one billion, six hundred thirty-three million, one hundred thirty-three thousand, five hundred thirty-four".