64626421426 has 24 divisors (see below), whose sum is σ = 112918002624. Its totient is φ = 27174435600.

The previous prime is 64626421403. The next prime is 64626421427. The reversal of 64626421426 is 62412462646.

It is not an unprimeable number, because it can be changed into a prime (64626421427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 782350 + ... + 861001.

It is an arithmetic number, because the mean of its divisors is an integer number (4704916776).

Almost surely, 2^64626421426 is an apocalyptic number.

64626421426 is a deficient number, since it is larger than the sum of its proper divisors (48291581198).

64626421426 is a wasteful number, since it uses less digits than its factorization.

64626421426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643466 (or 1643413 counting only the distinct ones).

The product of its digits is 663552, while the sum is 43.

The spelling of 64626421426 in words is "sixty-four billion, six hundred twenty-six million, four hundred twenty-one thousand, four hundred twenty-six".