161330250920 has 64 divisors (see below), whose sum is σ = 386069483520. Its totient is φ = 60463678464.

The previous prime is 161330250853. The next prime is 161330250959. The reversal of 161330250920 is 29052033161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380312 + ... + 683591.

It is an arithmetic number, because the mean of its divisors is an integer number (6032335680).

Almost surely, 2^161330250920 is an apocalyptic number.

161330250920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161330250920 is an abundant number, since it is smaller than the sum of its proper divisors (224739232600).

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

161330250920 is a wasteful number, since it uses less digits than its factorization.

161330250920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064154 (or 1064150 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The spelling of 161330250920 in words is "one hundred sixty-one billion, three hundred thirty million, two hundred fifty thousand, nine hundred twenty".