64621315001 has 4 divisors (see below), whose sum is σ = 64696544400. Its totient is φ = 64546085604.

The previous prime is 64621314983. The next prime is 64621315021. The reversal of 64621315001 is 10051312646.

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 64621315001 - 2⁶ = 64621314937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64621315021) 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, 37613411 + ... + 37615128.

It is an arithmetic number, because the mean of its divisors is an integer number (16174136100).

Almost surely, 2^64621315001 is an apocalyptic number.

It is an amenable number.

64621315001 is a deficient number, since it is larger than the sum of its proper divisors (75229399).

64621315001 is an equidigital number, since it uses as much as digits as its factorization.

64621315001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75229398.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 64621315001 its reverse (10051312646), we get a palindrome (74672627647).

The spelling of 64621315001 in words is "sixty-four billion, six hundred twenty-one million, three hundred fifteen thousand, one".