65413920757 has 4 divisors (see below), whose sum is σ = 65424441996. Its totient is φ = 65403399520.

The previous prime is 65413920743. The next prime is 65413920773. The reversal of 65413920757 is 75702931456.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4816221201 + 60597699556 = 69399^2 + 246166^2 .

It is a cyclic number.

It is not a de Polignac number, because 65413920757 - 2¹¹ = 65413918709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65413920757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65413920797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5251288 + ... + 5263729.

It is an arithmetic number, because the mean of its divisors is an integer number (16356110499).

Almost surely, 2^65413920757 is an apocalyptic number.

It is an amenable number.

65413920757 is a deficient number, since it is larger than the sum of its proper divisors (10521239).

65413920757 is a wasteful number, since it uses less digits than its factorization.

65413920757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10521238.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The spelling of 65413920757 in words is "sixty-five billion, four hundred thirteen million, nine hundred twenty thousand, seven hundred fifty-seven".