161543678974160 has 160 divisors (see below), whose sum is σ = 441589288833792. Its totient is φ = 53798594273280.

The previous prime is 161543678974147. The next prime is 161543678974217. The reversal of 161543678974160 is 61479876345161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5713175 + ... + 18860745.

Almost surely, 2^{161543678974160} is an apocalyptic number.

161543678974160 is a gapful number since it is divisible by the number (10) 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 161543678974160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220794644416896).

161543678974160 is an abundant number, since it is smaller than the sum of its proper divisors (280045609859632).

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

161543678974160 is a wasteful number, since it uses less digits than its factorization.

161543678974160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13148221 (or 13148215 counting only the distinct ones).

The product of its (nonzero) digits is 182891520, while the sum is 68.

The spelling of 161543678974160 in words is "one hundred sixty-one trillion, five hundred forty-three billion, six hundred seventy-eight million, nine hundred seventy-four thousand, one hundred sixty".