64605636620201 has 4 divisors (see below), whose sum is σ = 64637955600000. Its totient is φ = 64573317640404.

The previous prime is 64605636620141. The next prime is 64605636620227. The reversal of 64605636620201 is 10202663650646.

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 a de Polignac number, because none of the positive numbers 2^k-64605636620201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64605636220201) 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, 16159486901 + ... + 16159490898.

It is an arithmetic number, because the mean of its divisors is an integer number (16159488900000).

Almost surely, 2^{64605636620201} is an apocalyptic number.

It is an amenable number.

64605636620201 is a deficient number, since it is larger than the sum of its proper divisors (32318979799).

64605636620201 is a wasteful number, since it uses less digits than its factorization.

64605636620201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32318979798.

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 64605636620201 in words is "sixty-four trillion, six hundred five billion, six hundred thirty-six million, six hundred twenty thousand, two hundred one".