361641644 has 48 divisors (see below), whose sum is σ = 785154048. Its totient is φ = 141922368.

The previous prime is 361641619. The next prime is 361641667. The reversal of 361641644 is 446146163.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42317 + ... + 50139.

It is an arithmetic number, because the mean of its divisors is an integer number (16357376).

Almost surely, 2^361641644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 361641644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392577024).

361641644 is an abundant number, since it is smaller than the sum of its proper divisors (423512404).

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

361641644 is a wasteful number, since it uses less digits than its factorization.

361641644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7974 (or 7972 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 361641644 is about 19016.8778720378. The cubic root of 361641644 is about 712.4583459387.

The spelling of 361641644 in words is "three hundred sixty-one million, six hundred forty-one thousand, six hundred forty-four".