64819217575475 has 24 divisors (see below), whose sum is σ = 87774730821072. Its totient is φ = 47091782796800.

The previous prime is 64819217575457. The next prime is 64819217575481. The reversal of 64819217575475 is 57457571291846.

It is not a de Polignac number, because 64819217575475 - 2⁸ = 64819217575219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64819217575399 and 64819217575408.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123403322 + ... + 123927471.

It is an arithmetic number, because the mean of its divisors is an integer number (3657280450878).

Almost surely, 2^{64819217575475} is an apocalyptic number.

64819217575475 is a deficient number, since it is larger than the sum of its proper divisors (22955513245597).

64819217575475 is a wasteful number, since it uses less digits than its factorization.

64819217575475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247331767 (or 247331762 counting only the distinct ones).

The product of its digits is 592704000, while the sum is 71.

The spelling of 64819217575475 in words is "sixty-four trillion, eight hundred nineteen billion, two hundred seventeen million, five hundred seventy-five thousand, four hundred seventy-five".