961891189982 has 4 divisors (see below), whose sum is σ = 1442836784976. Its totient is φ = 480945594990.

The previous prime is 961891189979. The next prime is 961891189999. The reversal of 961891189982 is 289981198169.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×961891189982² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240472797494 + ... + 240472797497.

It is an arithmetic number, because the mean of its divisors is an integer number (360709196244).

Almost surely, 2^961891189982 is an apocalyptic number.

961891189982 is a deficient number, since it is larger than the sum of its proper divisors (480945594994).

961891189982 is a wasteful number, since it uses less digits than its factorization.

961891189982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480945594993.

The product of its digits is 40310784, while the sum is 71.

The spelling of 961891189982 in words is "nine hundred sixty-one billion, eight hundred ninety-one million, one hundred eighty-nine thousand, nine hundred eighty-two".