161678592 has 216 divisors, whose sum is σ = 508906944. Its totient is φ = 51093504.

The previous prime is 161678537. The next prime is 161678593. The reversal of 161678592 is 295876161.

It is a tau number, because it is divible by the number of its divisors (216).

It is a super-2 number, since 2×161678592² = 52279934222204928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161678593) 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, 1430728 + ... + 1430840.

Almost surely, 2^161678592 is an apocalyptic number.

161678592 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161678592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254453472).

161678592 is an abundant number, since it is smaller than the sum of its proper divisors (347228352).

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

161678592 is an equidigital number, since it uses as much as digits as its factorization.

161678592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 141 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 161678592 is about 12715.2896939079. The cubic root of 161678592 is about 544.7754224392.

It can be divided in two parts, 1616 and 78592, that added together give a palindrome (80208).

The spelling of 161678592 in words is "one hundred sixty-one million, six hundred seventy-eight thousand, five hundred ninety-two".