961961958 has 24 divisors (see below), whose sum is σ = 2156122800. Its totient is φ = 309596784.

The previous prime is 961961939. The next prime is 961962037. The reversal of 961961958 is 859169169.

961961958 is a `hidden beast` number, since 9 + 6 + 19 + 619 + 5 + 8 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 920898 + ... + 921941.

It is an arithmetic number, because the mean of its divisors is an integer number (89838450).

Almost surely, 2^961961958 is an apocalyptic number.

961961958 is an abundant number, since it is smaller than the sum of its proper divisors (1194160842).

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

961961958 is a wasteful number, since it uses less digits than its factorization.

961961958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842876 (or 1842873 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 54.

The square root of 961961958 is about 31015.5115708253. The cubic root of 961961958 is about 987.1564008457.

The spelling of 961961958 in words is "nine hundred sixty-one million, nine hundred sixty-one thousand, nine hundred fifty-eight".