160981551 has 24 divisors (see below), whose sum is σ = 251943120. Its totient is φ = 98654976.

The previous prime is 160981529. The next prime is 160981567. The reversal of 160981551 is 155189061.

160981551 is a `hidden beast` number, since 16 + 0 + 98 + 1 + 551 = 666.

It is not a de Polignac number, because 160981551 - 2⁷ = 160981423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160981591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5656 + ... + 18813.

It is an arithmetic number, because the mean of its divisors is an integer number (10497630).

Almost surely, 2^160981551 is an apocalyptic number.

160981551 is a deficient number, since it is larger than the sum of its proper divisors (90961569).

160981551 is a wasteful number, since it uses less digits than its factorization.

160981551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24535 (or 24532 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 36.

The square root of 160981551 is about 12687.8505271776. The cubic root of 160981551 is about 543.9914022845.

The spelling of 160981551 in words is "one hundred sixty million, nine hundred eighty-one thousand, five hundred fifty-one".