64557079771 has 8 divisors (see below), whose sum is σ = 67049262000. Its totient is φ = 62082636000.

The previous prime is 64557079753. The next prime is 64557079781. The reversal of 64557079771 is 17797075546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64557079771 - 2¹¹ = 64557077723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64557079711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4427196 + ... + 4441753.

It is an arithmetic number, because the mean of its divisors is an integer number (8381157750).

Almost surely, 2^64557079771 is an apocalyptic number.

64557079771 is a deficient number, since it is larger than the sum of its proper divisors (2492182229).

64557079771 is a wasteful number, since it uses less digits than its factorization.

64557079771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8869229.

The product of its (nonzero) digits is 12965400, while the sum is 58.

The spelling of 64557079771 in words is "sixty-four billion, five hundred fifty-seven million, seventy-nine thousand, seven hundred seventy-one".