64217570421 has 8 divisors (see below), whose sum is σ = 85627673440. Its totient is φ = 42809590512.

The previous prime is 64217570393. The next prime is 64217570503. The reversal of 64217570421 is 12407571246.

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

It is not a de Polignac number, because 64217570421 - 2¹⁵ = 64217537653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64217570421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64217570821) 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, 458806 + ... + 582183.

It is an arithmetic number, because the mean of its divisors is an integer number (10703459180).

Almost surely, 2^64217570421 is an apocalyptic number.

It is an amenable number.

64217570421 is a deficient number, since it is larger than the sum of its proper divisors (21410103019).

64217570421 is a wasteful number, since it uses less digits than its factorization.

64217570421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061555.

The product of its (nonzero) digits is 94080, while the sum is 39.

The spelling of 64217570421 in words is "sixty-four billion, two hundred seventeen million, five hundred seventy thousand, four hundred twenty-one".