65783779194 has 96 divisors (see below), whose sum is σ = 155010049920. Its totient is φ = 18555737088.

The previous prime is 65783779163. The next prime is 65783779213. The reversal of 65783779194 is 49197738756.

It is a Curzon 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 47 ways as a sum of consecutive naturals, for example, 8733622 + ... + 8741150.

It is an arithmetic number, because the mean of its divisors is an integer number (1614688020).

Almost surely, 2^65783779194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65783779194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77505024960).

65783779194 is an abundant number, since it is smaller than the sum of its proper divisors (89226270726).

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

65783779194 is a wasteful number, since it uses less digits than its factorization.

65783779194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7924 (or 7917 counting only the distinct ones).

The product of its digits is 80015040, while the sum is 66.

The spelling of 65783779194 in words is "sixty-five billion, seven hundred eighty-three million, seven hundred seventy-nine thousand, one hundred ninety-four".