1961792751966 has 16 divisors (see below), whose sum is σ = 4094176178304. Its totient is φ = 625499138264.

The previous prime is 1961792751953. The next prime is 1961792751967. The reversal of 1961792751966 is 6691572971691.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a self number, because there is not a number n which added to its sum of digits gives 1961792751966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961792751967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7107944616 + ... + 7107944891.

It is an arithmetic number, because the mean of its divisors is an integer number (255886011144).

Almost surely, 2^{1961792751966} is an apocalyptic number.

1961792751966 is an abundant number, since it is smaller than the sum of its proper divisors (2132383426338).

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

1961792751966 is a wasteful number, since it uses less digits than its factorization.

1961792751966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14215889535.

The product of its digits is 77157360, while the sum is 69.

The spelling of 1961792751966 in words is "one trillion, nine hundred sixty-one billion, seven hundred ninety-two million, seven hundred fifty-one thousand, nine hundred sixty-six".