161841764884780 has 24 divisors (see below), whose sum is σ = 339919761625920. Its totient is φ = 64726790645760.

The previous prime is 161841764884759. The next prime is 161841764884783. The reversal of 161841764884780 is 87488467148161.

161841764884780 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 2×161841764884780² (a number of 29 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (73) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (161841764884783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619572916 + ... + 619834075.

It is an arithmetic number, because the mean of its divisors is an integer number (14163323401080).

Almost surely, 2^{161841764884780} is an apocalyptic number.

161841764884780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161841764884780 is an abundant number, since it is smaller than the sum of its proper divisors (178077996741140).

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

161841764884780 is a wasteful number, since it uses less digits than its factorization.

161841764884780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239413529 (or 1239413527 counting only the distinct ones).

The product of its (nonzero) digits is 462422016, while the sum is 73.

The spelling of 161841764884780 in words is "one hundred sixty-one trillion, eight hundred forty-one billion, seven hundred sixty-four million, eight hundred eighty-four thousand, seven hundred eighty".