161505102 has 64 divisors (see below), whose sum is σ = 366520320. Its totient is φ = 47001600.

The previous prime is 161505101. The next prime is 161505139. The reversal of 161505102 is 201505161.

161505102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161505101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 394674 + ... + 395082.

It is an arithmetic number, because the mean of its divisors is an integer number (5726880).

Almost surely, 2^161505102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161505102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183260160).

161505102 is an abundant number, since it is smaller than the sum of its proper divisors (205015218).

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

161505102 is a wasteful number, since it uses less digits than its factorization.

161505102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 161505102 is about 12708.4657610586. The cubic root of 161505102 is about 544.5804947270.

The spelling of 161505102 in words is "one hundred sixty-one million, five hundred five thousand, one hundred two".