161244461632 has 28 divisors (see below), whose sum is σ = 320192947116. Its totient is φ = 80565923840.

The previous prime is 161244461611. The next prime is 161244461639. The reversal of 161244461632 is 236164442161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 118732619776 + 42511841856 = 344576^2 + 206184^2 .

It is not an unprimeable number, because it can be changed into a prime (161244461639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 787369 + ... + 970792.

It is an arithmetic number, because the mean of its divisors is an integer number (11435462397).

Almost surely, 2^161244461632 is an apocalyptic number.

It is an amenable number.

161244461632 is a deficient number, since it is larger than the sum of its proper divisors (158948485484).

161244461632 is a wasteful number, since it uses less digits than its factorization.

161244461632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759606 (or 1759596 counting only the distinct ones).

The product of its digits is 165888, while the sum is 40.

The spelling of 161244461632 in words is "one hundred sixty-one billion, two hundred forty-four million, four hundred sixty-one thousand, six hundred thirty-two".