161377403328 has 112 divisors (see below), whose sum is σ = 489723704320. Its totient is φ = 52057209600.

The previous prime is 161377403323. The next prime is 161377403371. The reversal of 161377403328 is 823304773161.

161377403328 is a `hidden beast` number, since 1 + 613 + 7 + 7 + 4 + 0 + 3 + 3 + 28 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161377403321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1452718 + ... + 1559853.

Almost surely, 2^161377403328 is an apocalyptic number.

161377403328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161377403328 is an abundant number, since it is smaller than the sum of its proper divisors (328346300992).

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

161377403328 is a wasteful number, since it uses less digits than its factorization.

161377403328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012623 (or 3012607 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 161377403328 in words is "one hundred sixty-one billion, three hundred seventy-seven million, four hundred three thousand, three hundred twenty-eight".