64428740426 has 8 divisors (see below), whose sum is σ = 97380844704. Its totient is φ = 31968458860.

The previous prime is 64428740407. The next prime is 64428740471. The reversal of 64428740426 is 62404782446.

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

It is a super-2 number, since 2×64428740426² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122955350 + ... + 122955873.

It is an arithmetic number, because the mean of its divisors is an integer number (12172605588).

Almost surely, 2^64428740426 is an apocalyptic number.

64428740426 is a deficient number, since it is larger than the sum of its proper divisors (32952104278).

64428740426 is a wasteful number, since it uses less digits than its factorization.

64428740426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245911356.

The product of its (nonzero) digits is 2064384, while the sum is 47.

The spelling of 64428740426 in words is "sixty-four billion, four hundred twenty-eight million, seven hundred forty thousand, four hundred twenty-six".