6445264278 has 8 divisors (see below), whose sum is σ = 12890528568. Its totient is φ = 2148421424.

The previous prime is 6445264271. The next prime is 6445264279. The reversal of 6445264278 is 8724625446.

It is a sphenic number, since it is the product of 3 distinct primes.

6445264278 is an admirable number.

It is a super-2 number, since 2×6445264278² = 83082863226525722568, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445264271) 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, 537105351 + ... + 537105362.

It is an arithmetic number, because the mean of its divisors is an integer number (1611316071).

Almost surely, 2^6445264278 is an apocalyptic number.

6445264278 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6445264278 is a wasteful number, since it uses less digits than its factorization.

6445264278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074210718.

The product of its digits is 2580480, while the sum is 48.

The square root of 6445264278 is about 80282.4032898866. The cubic root of 6445264278 is about 1861.0023000053.

The spelling of 6445264278 in words is "six billion, four hundred forty-five million, two hundred sixty-four thousand, two hundred seventy-eight".