65277116557 has 4 divisors (see below), whose sum is σ = 65356433440. Its totient is φ = 65197799676.

The previous prime is 65277116551. The next prime is 65277116581. The reversal of 65277116557 is 75561177256.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65277116557 - 2¹⁵ = 65277083789 is a prime.

It is a super-2 number, since 2×65277116557² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65277116551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39657207 + ... + 39658852.

It is an arithmetic number, because the mean of its divisors is an integer number (16339108360).

Almost surely, 2^65277116557 is an apocalyptic number.

It is an amenable number.

65277116557 is a deficient number, since it is larger than the sum of its proper divisors (79316883).

65277116557 is an equidigital number, since it uses as much as digits as its factorization.

65277116557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79316882.

The product of its digits is 3087000, while the sum is 52.

The spelling of 65277116557 in words is "sixty-five billion, two hundred seventy-seven million, one hundred sixteen thousand, five hundred fifty-seven".