65720735273 has 16 divisors (see below), whose sum is σ = 69906769920. Its totient is φ = 61608368016.

The previous prime is 65720735257. The next prime is 65720735303. The reversal of 65720735273 is 37253702756.

65720735273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 65720735273 - 2⁴ = 65720735257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65720735243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2584286 + ... + 2609592.

It is an arithmetic number, because the mean of its divisors is an integer number (4369173120).

Almost surely, 2^65720735273 is an apocalyptic number.

It is an amenable number.

65720735273 is a deficient number, since it is larger than the sum of its proper divisors (4186034647).

65720735273 is a wasteful number, since it uses less digits than its factorization.

65720735273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26756.

The product of its (nonzero) digits is 1852200, while the sum is 47.

The spelling of 65720735273 in words is "sixty-five billion, seven hundred twenty million, seven hundred thirty-five thousand, two hundred seventy-three".