161303155546 has 48 divisors (see below), whose sum is σ = 269728633944. Its totient is φ = 71910720000.

The previous prime is 161303155543. The next prime is 161303155547. The reversal of 161303155546 is 645551303161.

It can be written as a sum of positive squares in 12 ways, for example, as 6941389225 + 154361766321 = 83315^2 + 392889^2 .

It is a junction number, because it is equal to n+sod(n) for n = 161303155499 and 161303155508.

It is not an unprimeable number, because it can be changed into a prime (161303155543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4396036 + ... + 4432576.

Almost surely, 2^161303155546 is an apocalyptic number.

161303155546 is a deficient number, since it is larger than the sum of its proper divisors (108425478398).

161303155546 is a wasteful number, since it uses less digits than its factorization.

161303155546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36739 (or 36698 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 161303155546 in words is "one hundred sixty-one billion, three hundred three million, one hundred fifty-five thousand, five hundred forty-six".