65945389904 has 20 divisors (see below), whose sum is σ = 130885516020. Its totient is φ = 32168482560.

The previous prime is 65945389903. The next prime is 65945389949. The reversal of 65945389904 is 40998354956.

It can be written as a sum of positive squares in 2 ways, for example, as 24755875600 + 41189514304 = 157340^2 + 202952^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65945389903) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 50262599 + ... + 50263910.

It is an arithmetic number, because the mean of its divisors is an integer number (6544275801).

Almost surely, 2^65945389904 is an apocalyptic number.

It is an amenable number.

65945389904 is a deficient number, since it is larger than the sum of its proper divisors (64940126116).

65945389904 is a wasteful number, since it uses less digits than its factorization.

65945389904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100526558 (or 100526552 counting only the distinct ones).

The product of its (nonzero) digits is 41990400, while the sum is 62.

The spelling of 65945389904 in words is "sixty-five billion, nine hundred forty-five million, three hundred eighty-nine thousand, nine hundred four".