64278001 has 4 divisors (see below), whose sum is σ = 64561392. Its totient is φ = 63994612.

The previous prime is 64277981. The next prime is 64278017. The reversal of 64278001 is 10087246.

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 64278001 - 2¹⁹ = 63753713 is a prime.

It is a super-4 number, since 4×64278001⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64278061) 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, 141355 + ... + 141808.

It is an arithmetic number, because the mean of its divisors is an integer number (16140348).

Almost surely, 2^64278001 is an apocalyptic number.

It is an amenable number.

64278001 is a deficient number, since it is larger than the sum of its proper divisors (283391).

64278001 is a wasteful number, since it uses less digits than its factorization.

64278001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283390.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 64278001 is about 8017.3562350690. The cubic root of 64278001 is about 400.5783321767.

The spelling of 64278001 in words is "sixty-four million, two hundred seventy-eight thousand, one".