161537958 has 24 divisors (see below), whose sum is σ = 356604768. Its totient is φ = 52829712.

The previous prime is 161537941. The next prime is 161537963. The reversal of 161537958 is 859735161.

It is a happy number.

161537958 is a `hidden beast` number, since 1 + 61 + 537 + 9 + 58 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83710 + ... + 85617.

It is an arithmetic number, because the mean of its divisors is an integer number (14858532).

Almost surely, 2^161537958 is an apocalyptic number.

161537958 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

161537958 is an abundant number, since it is smaller than the sum of its proper divisors (195066810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161537958 is a wasteful number, since it uses less digits than its factorization.

161537958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169388 (or 169385 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 161537958 is about 12709.7583769323. The cubic root of 161537958 is about 544.6174213696.

The spelling of 161537958 in words is "one hundred sixty-one million, five hundred thirty-seven thousand, nine hundred fifty-eight".