64288621 has 16 divisors (see below), whose sum is σ = 68739840. Its totient is φ = 60020800.

The previous prime is 64288613. The next prime is 64288639. The reversal of 64288621 is 12688246.

It is a cyclic number.

It is not a de Polignac number, because 64288621 - 2³ = 64288613 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 (64288681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137430 + ... + 137896.

It is an arithmetic number, because the mean of its divisors is an integer number (4296240).

Almost surely, 2^64288621 is an apocalyptic number.

It is an amenable number.

64288621 is a deficient number, since it is larger than the sum of its proper divisors (4451219).

64288621 is a wasteful number, since it uses less digits than its factorization.

64288621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644.

The product of its digits is 36864, while the sum is 37.

The square root of 64288621 is about 8018.0185208067. The cubic root of 64288621 is about 400.6003921224.

The spelling of 64288621 in words is "sixty-four million, two hundred eighty-eight thousand, six hundred twenty-one".