161580724458 has 8 divisors (see below), whose sum is σ = 323161448928. Its totient is φ = 53860241484.

The previous prime is 161580724397. The next prime is 161580724477. The reversal of 161580724458 is 854427085161.

It is a happy number.

161580724458 is digitally balanced in base 3 and base 7, because in such bases it contains all the possibile digits an equal number of times.

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

161580724458 is an admirable number.

It is a super-2 number, since 2×161580724458² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161580724458.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13465060366 + ... + 13465060377.

It is an arithmetic number, because the mean of its divisors is an integer number (40395181116).

Almost surely, 2^161580724458 is an apocalyptic number.

161580724458 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161580724458 is a wasteful number, since it uses less digits than its factorization.

161580724458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26930120748.

The product of its (nonzero) digits is 2150400, while the sum is 51.

The spelling of 161580724458 in words is "one hundred sixty-one billion, five hundred eighty million, seven hundred twenty-four thousand, four hundred fifty-eight".