161102040 has 192 divisors, whose sum is σ = 549089280. Its totient is φ = 37497600.

The previous prime is 161101981. The next prime is 161102059. The reversal of 161102040 is 40201161.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1268457 + ... + 1268583.

It is an arithmetic number, because the mean of its divisors is an integer number (2859840).

Almost surely, 2^161102040 is an apocalyptic number.

161102040 is a gapful number since it is divisible by the number (10) 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 161102040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274544640).

161102040 is an abundant number, since it is smaller than the sum of its proper divisors (387987240).

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

161102040 is a wasteful number, since it uses less digits than its factorization.

161102040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 161102040 is about 12692.5978428374. The cubic root of 161102040 is about 544.1270878827.

It can be divided in two parts, 161 and 102040, that added together give a palindrome (102201).

The spelling of 161102040 in words is "one hundred sixty-one million, one hundred two thousand, forty".