161301574536 has 64 divisors (see below), whose sum is σ = 404449951680. Its totient is φ = 53607966720.

The previous prime is 161301574493. The next prime is 161301574537. The reversal of 161301574536 is 635475103161.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (161301574537) 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 15 ways as a sum of consecutive naturals, for example, 11646976 + ... + 11660816.

It is an arithmetic number, because the mean of its divisors is an integer number (6319530495).

Almost surely, 2^161301574536 is an apocalyptic number.

It is an amenable number.

161301574536 is an abundant number, since it is smaller than the sum of its proper divisors (243148377144).

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

161301574536 is a wasteful number, since it uses less digits than its factorization.

161301574536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15254 (or 15250 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

Adding to 161301574536 its reverse (635475103161), we get a palindrome (796776677697).

The spelling of 161301574536 in words is "one hundred sixty-one billion, three hundred one million, five hundred seventy-four thousand, five hundred thirty-six".