161329546940 has 24 divisors (see below), whose sum is σ = 343563770592. Its totient is φ = 63622919360.

The previous prime is 161329546927. The next prime is 161329546957. The reversal of 161329546940 is 49645923161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56804759 + ... + 56807598.

It is an arithmetic number, because the mean of its divisors is an integer number (14315157108).

Almost surely, 2^161329546940 is an apocalyptic number.

161329546940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161329546940 is an abundant number, since it is smaller than the sum of its proper divisors (182234223652).

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

161329546940 is a wasteful number, since it uses less digits than its factorization.

161329546940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113612437 (or 113612435 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 161329546940 in words is "one hundred sixty-one billion, three hundred twenty-nine million, five hundred forty-six thousand, nine hundred forty".