64633407421 has 8 divisors (see below), whose sum is σ = 70516103904. Its totient is φ = 58751866320.

The previous prime is 64633407401. The next prime is 64633407467. The reversal of 64633407421 is 12470433646.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 64633407421 - 2⁹ = 64633406909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64633407401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169735 + ... + 397588.

It is an arithmetic number, because the mean of its divisors is an integer number (8814512988).

Almost surely, 2^64633407421 is an apocalyptic number.

It is an amenable number.

64633407421 is a deficient number, since it is larger than the sum of its proper divisors (5882696483).

64633407421 is a wasteful number, since it uses less digits than its factorization.

64633407421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577691.

The product of its (nonzero) digits is 290304, while the sum is 40.

The spelling of 64633407421 in words is "sixty-four billion, six hundred thirty-three million, four hundred seven thousand, four hundred twenty-one".