161517792 has 24 divisors (see below), whose sum is σ = 423984456. Its totient is φ = 53839232.

The previous prime is 161517787. The next prime is 161517821. The reversal of 161517792 is 297715161.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 161517792.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 841143 + ... + 841334.

It is an arithmetic number, because the mean of its divisors is an integer number (17666019).

Almost surely, 2^161517792 is an apocalyptic number.

161517792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161517792 is an abundant number, since it is smaller than the sum of its proper divisors (262466664).

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

161517792 is a wasteful number, since it uses less digits than its factorization.

161517792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682490 (or 1682482 counting only the distinct ones).

The product of its digits is 26460, while the sum is 39.

The square root of 161517792 is about 12708.9650247375. The cubic root of 161517792 is about 544.5947575282.

The spelling of 161517792 in words is "one hundred sixty-one million, five hundred seventeen thousand, seven hundred ninety-two".