64477172741217 has 4 divisors (see below), whose sum is σ = 85969563654960. Its totient is φ = 42984781827476.

The previous prime is 64477172741213. The next prime is 64477172741239. The reversal of 64477172741217 is 71214727177446.

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 64477172741217 - 2² = 64477172741213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64477172741213) 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, 10746195456867 + ... + 10746195456872.

It is an arithmetic number, because the mean of its divisors is an integer number (21492390913740).

Almost surely, 2^{64477172741217} is an apocalyptic number.

It is an amenable number.

64477172741217 is a deficient number, since it is larger than the sum of its proper divisors (21492390913743).

64477172741217 is a wasteful number, since it uses less digits than its factorization.

64477172741217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21492390913742.

The product of its digits is 25815552, while the sum is 60.

The spelling of 64477172741217 in words is "sixty-four trillion, four hundred seventy-seven billion, one hundred seventy-two million, seven hundred forty-one thousand, two hundred seventeen".