161656775016 has 32 divisors (see below), whose sum is σ = 440882114400. Its totient is φ = 48986901440.

The previous prime is 161656774991. The next prime is 161656775101. The reversal of 161656775016 is 610577656161.

161656775016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161656775016² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161656775016.

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 7 ways as a sum of consecutive naturals, for example, 306167871 + ... + 306168398.

It is an arithmetic number, because the mean of its divisors is an integer number (13777566075).

Almost surely, 2^161656775016 is an apocalyptic number.

It is an amenable number.

161656775016 is an abundant number, since it is smaller than the sum of its proper divisors (279225339384).

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

161656775016 is a wasteful number, since it uses less digits than its factorization.

161656775016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612336289 (or 612336285 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 51.

The spelling of 161656775016 in words is "one hundred sixty-one billion, six hundred fifty-six million, seven hundred seventy-five thousand, sixteen".