161461542550 has 96 divisors (see below), whose sum is σ = 375807089664. Its totient is φ = 50139648000.

The previous prime is 161461542497. The next prime is 161461542577. The reversal of 161461542550 is 55245164161.

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 47 ways as a sum of consecutive naturals, for example, 965974 + ... + 1120726.

It is an arithmetic number, because the mean of its divisors is an integer number (3914657184).

Almost surely, 2^161461542550 is an apocalyptic number.

161461542550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161461542550 is an abundant number, since it is smaller than the sum of its proper divisors (214345547114).

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

161461542550 is a wasteful number, since it uses less digits than its factorization.

161461542550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155054 (or 155049 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 161461542550 in words is "one hundred sixty-one billion, four hundred sixty-one million, five hundred forty-two thousand, five hundred fifty".