961441866 has 128 divisors (see below), whose sum is σ = 2689873920. Its totient is φ = 247276800.

The previous prime is 961441853. The next prime is 961441903. The reversal of 961441866 is 668144169.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 443826 + ... + 445986.

It is an arithmetic number, because the mean of its divisors is an integer number (21014640).

Almost surely, 2^961441866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 961441866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1344936960).

961441866 is an abundant number, since it is smaller than the sum of its proper divisors (1728432054).

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

961441866 is a wasteful number, since it uses less digits than its factorization.

961441866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297 (or 2291 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 961441866 is about 31007.1260519255. The cubic root of 961441866 is about 986.9784642523.

The spelling of 961441866 in words is "nine hundred sixty-one million, four hundred forty-one thousand, eight hundred sixty-six".