161212744 has 96 divisors (see below), whose sum is σ = 388238400. Its totient is φ = 62233920.

The previous prime is 161212729. The next prime is 161212747. The reversal of 161212744 is 447212161.

161212744 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 (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161212747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1478962 + ... + 1479070.

It is an arithmetic number, because the mean of its divisors is an integer number (4044150).

Almost surely, 2^161212744 is an apocalyptic number.

161212744 is a gapful number since it is divisible by the number (14) 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 161212744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194119200).

161212744 is an abundant number, since it is smaller than the sum of its proper divisors (227025656).

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

161212744 is an equidigital number, since it uses as much as digits as its factorization.

161212744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 129 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 161212744 is about 12696.9580608900. The cubic root of 161212744 is about 544.2516947318.

The spelling of 161212744 in words is "one hundred sixty-one million, two hundred twelve thousand, seven hundred forty-four".