65968191954 has 24 divisors (see below), whose sum is σ = 163349808960. Its totient is φ = 18848054808.

The previous prime is 65968191953. The next prime is 65968191967. The reversal of 65968191954 is 45919186956.

65968191954 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 65968191891 and 65968191900.

It is not an unprimeable number, because it can be changed into a prime (65968191953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261778414 + ... + 261778665.

It is an arithmetic number, because the mean of its divisors is an integer number (6806242040).

Almost surely, 2^65968191954 is an apocalyptic number.

65968191954 is an abundant number, since it is smaller than the sum of its proper divisors (97381617006).

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

65968191954 is a wasteful number, since it uses less digits than its factorization.

65968191954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523557094 (or 523557091 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 63.

The spelling of 65968191954 in words is "sixty-five billion, nine hundred sixty-eight million, one hundred ninety-one thousand, nine hundred fifty-four".