161133502736 has 20 divisors (see below), whose sum is σ = 312459211152. Its totient is φ = 80498867616.

The previous prime is 161133502727. The next prime is 161133502759. The reversal of 161133502736 is 637205331161.

It is a self number, because there is not a number n which added to its sum of digits gives 161133502736.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4223150 + ... + 4261133.

Almost surely, 2^161133502736 is an apocalyptic number.

161133502736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161133502736 is a deficient number, since it is larger than the sum of its proper divisors (151325708416).

161133502736 is a wasteful number, since it uses less digits than its factorization.

161133502736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8485478 (or 8485472 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 38.

Adding to 161133502736 its reverse (637205331161), we get a palindrome (798338833897).

The spelling of 161133502736 in words is "one hundred sixty-one billion, one hundred thirty-three million, five hundred two thousand, seven hundred thirty-six".