161503771136 has 40 divisors (see below), whose sum is σ = 322747067940. Its totient is φ = 80738131968.

The previous prime is 161503771133. The next prime is 161503771147. The reversal of 161503771136 is 631177305161.

161503771136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 138443526400 + 23060244736 = 372080^2 + 151856^2 .

It is a super-2 number, since 2×161503771136² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161503771093 and 161503771102.

It is not an unprimeable number, because it can be changed into a prime (161503771133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3411500 + ... + 3458516.

Almost surely, 2^161503771136 is an apocalyptic number.

161503771136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161503771136 is a deficient number, since it is larger than the sum of its proper divisors (161243296804).

161503771136 is an frugal number, since it uses more digits than its factorization.

161503771136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53744 (or 53728 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 41.

The spelling of 161503771136 in words is "one hundred sixty-one billion, five hundred three million, seven hundred seventy-one thousand, one hundred thirty-six".