64637403428 has 24 divisors (see below), whose sum is σ = 121825546752. Its totient is φ = 29830467744.

The previous prime is 64637403427. The next prime is 64637403433. The reversal of 64637403428 is 82430473646.

It is not an unprimeable number, because it can be changed into a prime (64637403427) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 835901 + ... + 909947.

It is an arithmetic number, because the mean of its divisors is an integer number (5076064448).

Almost surely, 2^64637403428 is an apocalyptic number.

It is an amenable number.

64637403428 is a deficient number, since it is larger than the sum of its proper divisors (57188143324).

64637403428 is a wasteful number, since it uses less digits than its factorization.

64637403428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90851 (or 90849 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 47.

The spelling of 64637403428 in words is "sixty-four billion, six hundred thirty-seven million, four hundred three thousand, four hundred twenty-eight".