64616277543 has 4 divisors (see below), whose sum is σ = 86155036728. Its totient is φ = 43077518360.

The previous prime is 64616277497. The next prime is 64616277559. The reversal of 64616277543 is 34577261646.

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

It is a cyclic number.

It is not a de Polignac number, because 64616277543 - 2⁸ = 64616277287 is a prime.

It is a super-2 number, since 2×64616277543² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64616277043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10769379588 + ... + 10769379593.

It is an arithmetic number, because the mean of its divisors is an integer number (21538759182).

Almost surely, 2^64616277543 is an apocalyptic number.

64616277543 is a deficient number, since it is larger than the sum of its proper divisors (21538759185).

64616277543 is a wasteful number, since it uses less digits than its factorization.

64616277543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21538759184.

The product of its digits is 5080320, while the sum is 51.

The spelling of 64616277543 in words is "sixty-four billion, six hundred sixteen million, two hundred seventy-seven thousand, five hundred forty-three".