64547808605279 has 4 divisors (see below), whose sum is σ = 65511208733784. Its totient is φ = 63584408476776.

The previous prime is 64547808605263. The next prime is 64547808605309. The reversal of 64547808605279 is 97250680874546.

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 64547808605279 - 2⁴ = 64547808605263 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 (64547808605479) 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, 481700064152 + ... + 481700064285.

It is an arithmetic number, because the mean of its divisors is an integer number (16377802183446).

Almost surely, 2^{64547808605279} is an apocalyptic number.

64547808605279 is a deficient number, since it is larger than the sum of its proper divisors (963400128505).

64547808605279 is an equidigital number, since it uses as much as digits as its factorization.

64547808605279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963400128504.

The product of its (nonzero) digits is 812851200, while the sum is 71.

The spelling of 64547808605279 in words is "sixty-four trillion, five hundred forty-seven billion, eight hundred eight million, six hundred five thousand, two hundred seventy-nine".