161432721010626 has 64 divisors (see below), whose sum is σ = 347792846257920. Its totient is φ = 49658522618880.

The previous prime is 161432721010619. The next prime is 161432721010643. The reversal of 161432721010626 is 626010127234161.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8815188846 + ... + 8815207158.

It is an arithmetic number, because the mean of its divisors is an integer number (5434263222780).

Almost surely, 2^{161432721010626} is an apocalyptic number.

161432721010626 is an abundant number, since it is smaller than the sum of its proper divisors (186360125247294).

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

161432721010626 is a wasteful number, since it uses less digits than its factorization.

161432721010626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41931.

The product of its (nonzero) digits is 145152, while the sum is 42.

Adding to 161432721010626 its reverse (626010127234161), we get a palindrome (787442848244787).

The spelling of 161432721010626 in words is "one hundred sixty-one trillion, four hundred thirty-two billion, seven hundred twenty-one million, ten thousand, six hundred twenty-six".