161888545 has 16 divisors (see below), whose sum is σ = 239097600. Its totient is φ = 102469824.

The previous prime is 161888533. The next prime is 161888561. The reversal of 161888545 is 545888161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161888545 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161888495 and 161888504.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177445 + ... + 178354.

It is an arithmetic number, because the mean of its divisors is an integer number (14943600).

Almost surely, 2^161888545 is an apocalyptic number.

It is an amenable number.

161888545 is a deficient number, since it is larger than the sum of its proper divisors (77209055).

161888545 is a wasteful number, since it uses less digits than its factorization.

161888545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355824.

The product of its digits is 307200, while the sum is 46.

The square root of 161888545 is about 12723.5429421211. The cubic root of 161888545 is about 545.0111323933.

The spelling of 161888545 in words is "one hundred sixty-one million, eight hundred eighty-eight thousand, five hundred forty-five".