65850723920 has 40 divisors (see below), whose sum is σ = 153122684640. Its totient is φ = 26336891520.

The previous prime is 65850723901. The next prime is 65850723923. The reversal of 65850723920 is 2932705856.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65850723923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624635 + ... + 722405.

It is an arithmetic number, because the mean of its divisors is an integer number (3828067116).

Almost surely, 2^65850723920 is an apocalyptic number.

It is an amenable number.

65850723920 is an abundant number, since it is smaller than the sum of its proper divisors (87271960720).

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

65850723920 is a wasteful number, since it uses less digits than its factorization.

65850723920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106203 (or 106197 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 65850723920 in words is "sixty-five billion, eight hundred fifty million, seven hundred twenty-three thousand, nine hundred twenty".