65571713557 has 16 divisors (see below), whose sum is σ = 79361648640. Its totient is φ = 52888612608.

The previous prime is 65571713549. The next prime is 65571713611. The reversal of 65571713557 is 75531717556.

It is a cyclic number.

It is not a de Polignac number, because 65571713557 - 2³ = 65571713549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65571713507) 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, 651468 + ... + 745354.

It is an arithmetic number, because the mean of its divisors is an integer number (4960103040).

Almost surely, 2^65571713557 is an apocalyptic number.

It is an amenable number.

65571713557 is a deficient number, since it is larger than the sum of its proper divisors (13789935083).

65571713557 is a wasteful number, since it uses less digits than its factorization.

65571713557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99780.

The product of its digits is 3858750, while the sum is 52.

The spelling of 65571713557 in words is "sixty-five billion, five hundred seventy-one million, seven hundred thirteen thousand, five hundred fifty-seven".