161281200536 has 32 divisors (see below), whose sum is σ = 306281736000. Its totient is φ = 79606415616.

The previous prime is 161281200523. The next prime is 161281200539. The reversal of 161281200536 is 635002182161.

It is a junction number, because it is equal to n+sod(n) for n = 161281200496 and 161281200505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161281200539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4474940 + ... + 4510836.

It is an arithmetic number, because the mean of its divisors is an integer number (9571304250).

Almost surely, 2^161281200536 is an apocalyptic number.

It is an amenable number.

161281200536 is a deficient number, since it is larger than the sum of its proper divisors (145000535464).

161281200536 is a wasteful number, since it uses less digits than its factorization.

161281200536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43091 (or 43087 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

Adding to 161281200536 its reverse (635002182161), we get a palindrome (796283382697).

The spelling of 161281200536 in words is "one hundred sixty-one billion, two hundred eighty-one million, two hundred thousand, five hundred thirty-six".