161133573547 has 4 divisors (see below), whose sum is σ = 161223044296. Its totient is φ = 161044102800.

The previous prime is 161133573533. The next prime is 161133573569. The reversal of 161133573547 is 745375331161.

It is a happy number.

161133573547 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161133573547 is a prime.

It is a super-2 number, since 2×161133573547² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161133573497 and 161133573506.

It is not an unprimeable number, because it can be changed into a prime (161133573577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44732673 + ... + 44736274.

It is an arithmetic number, because the mean of its divisors is an integer number (40305761074).

Almost surely, 2^161133573547 is an apocalyptic number.

161133573547 is a deficient number, since it is larger than the sum of its proper divisors (89470749).

161133573547 is an equidigital number, since it uses as much as digits as its factorization.

161133573547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89470748.

The product of its digits is 793800, while the sum is 46.

The spelling of 161133573547 in words is "one hundred sixty-one billion, one hundred thirty-three million, five hundred seventy-three thousand, five hundred forty-seven".