161515105050 has 96 divisors (see below), whose sum is σ = 431785488960. Its totient is φ = 39719232000.

The previous prime is 161515105039. The next prime is 161515105109. The reversal of 161515105050 is 50501515161.

161515105050 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 161515104999 and 161515105017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2010046 + ... + 2088854.

It is an arithmetic number, because the mean of its divisors is an integer number (4497765510).

Almost surely, 2^161515105050 is an apocalyptic number.

161515105050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161515105050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215892744480).

161515105050 is an abundant number, since it is smaller than the sum of its proper divisors (270270383910).

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

161515105050 is a wasteful number, since it uses less digits than its factorization.

161515105050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79888 (or 79883 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 30.

The spelling of 161515105050 in words is "one hundred sixty-one billion, five hundred fifteen million, one hundred five thousand, fifty".