161133455634 has 32 divisors (see below), whose sum is σ = 324947004480. Its totient is φ = 53266036032.

The previous prime is 161133455611. The next prime is 161133455647. The reversal of 161133455634 is 436554331161.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216577 + ... + 607595.

It is an arithmetic number, because the mean of its divisors is an integer number (10154593890).

Almost surely, 2^161133455634 is an apocalyptic number.

161133455634 is an abundant number, since it is smaller than the sum of its proper divisors (163813548846).

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

161133455634 is a wasteful number, since it uses less digits than its factorization.

161133455634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391594.

The product of its digits is 388800, while the sum is 42.

Adding to 161133455634 its reverse (436554331161), we get a palindrome (597687786795).

The spelling of 161133455634 in words is "one hundred sixty-one billion, one hundred thirty-three million, four hundred fifty-five thousand, six hundred thirty-four".