961891321002 has 16 divisors (see below), whose sum is σ = 1931268180672. Its totient is φ = 319382850560.

The previous prime is 961891320983. The next prime is 961891321003. The reversal of 961891321002 is 200123198169.

It is not an unprimeable number, because it can be changed into a prime (961891321003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311895774 + ... + 311898857.

It is an arithmetic number, because the mean of its divisors is an integer number (120704261292).

Almost surely, 2^961891321002 is an apocalyptic number.

961891321002 is an abundant number, since it is smaller than the sum of its proper divisors (969376859670).

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

961891321002 is a wasteful number, since it uses less digits than its factorization.

961891321002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623794893.

The product of its (nonzero) digits is 46656, while the sum is 42.

The spelling of 961891321002 in words is "nine hundred sixty-one billion, eight hundred ninety-one million, three hundred twenty-one thousand, two".