161510161244 has 6 divisors (see below), whose sum is σ = 282642782184. Its totient is φ = 80755080620.

The previous prime is 161510161243. The next prime is 161510161247. The reversal of 161510161244 is 442161015161.

It is a self number, because there is not a number n which added to its sum of digits gives 161510161244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161510161243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20188770152 + ... + 20188770159.

It is an arithmetic number, because the mean of its divisors is an integer number (47107130364).

Almost surely, 2^161510161244 is an apocalyptic number.

It is an amenable number.

161510161244 is a deficient number, since it is larger than the sum of its proper divisors (121132620940).

161510161244 is a wasteful number, since it uses less digits than its factorization.

161510161244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40377540315 (or 40377540313 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The spelling of 161510161244 in words is "one hundred sixty-one billion, five hundred ten million, one hundred sixty-one thousand, two hundred forty-four".