161920088428 has 48 divisors (see below), whose sum is σ = 342954501120. Its totient is φ = 65299942656.

The previous prime is 161920088387. The next prime is 161920088431. The reversal of 161920088428 is 824880029161.

161920088428 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 2×161920088428² (a number of 23 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 2734843 + ... + 2793421.

It is an arithmetic number, because the mean of its divisors is an integer number (7144885440).

Almost surely, 2^161920088428 is an apocalyptic number.

It is an amenable number.

161920088428 is an abundant number, since it is smaller than the sum of its proper divisors (181034412692).

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

161920088428 is a wasteful number, since it uses less digits than its factorization.

161920088428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64414 (or 64412 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 49.

The spelling of 161920088428 in words is "one hundred sixty-one billion, nine hundred twenty million, eighty-eight thousand, four hundred twenty-eight".