161580539674 has 8 divisors (see below), whose sum is σ = 242376428160. Its totient is φ = 80788396956.

The previous prime is 161580539671. The next prime is 161580539677. The reversal of 161580539674 is 476935085161.

It is an interprime number because it is at equal distance from previous prime (161580539671) and next prime (161580539677).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×161580539674² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161580539671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 825994 + ... + 1002709.

It is an arithmetic number, because the mean of its divisors is an integer number (30297053520).

Almost surely, 2^161580539674 is an apocalyptic number.

161580539674 is a deficient number, since it is larger than the sum of its proper divisors (80795888486).

161580539674 is a wasteful number, since it uses less digits than its factorization.

161580539674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872884.

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 161580539674 in words is "one hundred sixty-one billion, five hundred eighty million, five hundred thirty-nine thousand, six hundred seventy-four".