161439709552 has 40 divisors (see below), whose sum is σ = 341583248880. Its totient is φ = 73304609280.

The previous prime is 161439709537. The next prime is 161439709553. The reversal of 161439709552 is 255907934161.

161439709552 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 (52) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 161439709552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161439709553) by changing a digit.

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, 313527 + ... + 648982.

It is an arithmetic number, because the mean of its divisors is an integer number (8539581222).

Almost surely, 2^161439709552 is an apocalyptic number.

It is an amenable number.

161439709552 is an abundant number, since it is smaller than the sum of its proper divisors (180143539328).

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

161439709552 is a wasteful number, since it uses less digits than its factorization.

161439709552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963481 (or 963475 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 52.

The spelling of 161439709552 in words is "one hundred sixty-one billion, four hundred thirty-nine million, seven hundred nine thousand, five hundred fifty-two".