961856646 has 32 divisors (see below), whose sum is σ = 2027385600. Its totient is φ = 303380640.

The previous prime is 961856641. The next prime is 961856663. The reversal of 961856646 is 646658169.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961856641) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 100176 + ... + 109356.

It is an arithmetic number, because the mean of its divisors is an integer number (63355800).

Almost surely, 2^961856646 is an apocalyptic number.

961856646 is an abundant number, since it is smaller than the sum of its proper divisors (1065528954).

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

961856646 is a wasteful number, since it uses less digits than its factorization.

961856646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10124.

The product of its digits is 1866240, while the sum is 51.

The square root of 961856646 is about 31013.8137932116. The cubic root of 961856646 is about 987.1203761333.

It can be divided in two parts, 96185 and 6646, that added together give a triangular number (102831 = T₄₅₃).

The spelling of 961856646 in words is "nine hundred sixty-one million, eight hundred fifty-six thousand, six hundred forty-six".