161143754616 has 128 divisors (see below), whose sum is σ = 486734976000. Its totient is φ = 49101220224.

The previous prime is 161143754599. The next prime is 161143754621. The reversal of 161143754616 is 616457341161.

161143754616 is a `hidden beast` number, since 1 + 6 + 114 + 3 + 75 + 461 + 6 = 666.

161143754616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10645 + ... + 567803.

It is an arithmetic number, because the mean of its divisors is an integer number (3802617000).

Almost surely, 2^161143754616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161143754616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243367488000).

161143754616 is an abundant number, since it is smaller than the sum of its proper divisors (325591221384).

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

161143754616 is a wasteful number, since it uses less digits than its factorization.

161143754616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557290 (or 557280 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 161143754616 in words is "one hundred sixty-one billion, one hundred forty-three million, seven hundred fifty-four thousand, six hundred sixteen".