161501946976 has 96 divisors (see below), whose sum is σ = 345296286720. Its totient is φ = 74059646976.

The previous prime is 161501946941. The next prime is 161501946979. The reversal of 161501946976 is 679649105161.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161501946979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10261225 + ... + 10276951.

It is an arithmetic number, because the mean of its divisors is an integer number (3596836320).

Almost surely, 2^161501946976 is an apocalyptic number.

161501946976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161501946976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172648143360).

161501946976 is an abundant number, since it is smaller than the sum of its proper divisors (183794339744).

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

161501946976 is a wasteful number, since it uses less digits than its factorization.

161501946976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16236 (or 16228 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 161501946976 in words is "one hundred sixty-one billion, five hundred one million, nine hundred forty-six thousand, nine hundred seventy-six".