64278427407 has 16 divisors (see below), whose sum is σ = 88074125568. Its totient is φ = 41676062400.

The previous prime is 64278427397. The next prime is 64278427441. The reversal of 64278427407 is 70472487246.

It is not a de Polignac number, because 64278427407 - 2⁴ = 64278427391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64278427407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64278427307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1039219 + ... + 1099332.

It is an arithmetic number, because the mean of its divisors is an integer number (5504632848).

Almost surely, 2^64278427407 is an apocalyptic number.

64278427407 is a deficient number, since it is larger than the sum of its proper divisors (23795698161).

64278427407 is a wasteful number, since it uses less digits than its factorization.

64278427407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138830.

The product of its (nonzero) digits is 4214784, while the sum is 51.

The spelling of 64278427407 in words is "sixty-four billion, two hundred seventy-eight million, four hundred twenty-seven thousand, four hundred seven".