64160621 has 4 divisors (see below), whose sum is σ = 73326432. Its totient is φ = 54994812.

The previous prime is 64160617. The next prime is 64160623. The reversal of 64160621 is 12606146.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64160621 - 2² = 64160617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64160623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4582895 + ... + 4582908.

It is an arithmetic number, because the mean of its divisors is an integer number (18331608).

Almost surely, 2^64160621 is an apocalyptic number.

It is an amenable number.

64160621 is a deficient number, since it is larger than the sum of its proper divisors (9165811).

64160621 is an equidigital number, since it uses as much as digits as its factorization.

64160621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9165810.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 64160621 is about 8010.0325217817. The cubic root of 64160621 is about 400.3343475348.

Adding to 64160621 its reverse (12606146), we get a palindrome (76766767).

The spelling of 64160621 in words is "sixty-four million, one hundred sixty thousand, six hundred twenty-one".