64428012279 has 12 divisors (see below), whose sum is σ = 96509450856. Its totient is φ = 42952008024.

The previous prime is 64428012251. The next prime is 64428012307. The reversal of 64428012279 is 97221082446.

64428012279 is a `hidden beast` number, since 6 + 442 + 80 + 122 + 7 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (64428012251) and next prime (64428012307).

It is not a de Polignac number, because 64428012279 - 2³¹ = 62280528631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64428012239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132567684 + ... + 132568169.

It is an arithmetic number, because the mean of its divisors is an integer number (8042454238).

Almost surely, 2^64428012279 is an apocalyptic number.

64428012279 is a deficient number, since it is larger than the sum of its proper divisors (32081438577).

64428012279 is an equidigital number, since it uses as much as digits as its factorization.

64428012279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265135868 (or 265135856 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 64428012279 in words is "sixty-four billion, four hundred twenty-eight million, twelve thousand, two hundred seventy-nine".