64642462006641 has 4 divisors (see below), whose sum is σ = 86189949342192. Its totient is φ = 43094974671092.

The previous prime is 64642462006627. The next prime is 64642462006651. The reversal of 64642462006641 is 14660026424646.

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 64642462006641 - 2¹⁴ = 64642461990257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64642462006651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10773743667771 + ... + 10773743667776.

It is an arithmetic number, because the mean of its divisors is an integer number (21547487335548).

Almost surely, 2^{64642462006641} is an apocalyptic number.

It is an amenable number.

64642462006641 is a deficient number, since it is larger than the sum of its proper divisors (21547487335551).

64642462006641 is a wasteful number, since it uses less digits than its factorization.

64642462006641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21547487335550.

The product of its (nonzero) digits is 7962624, while the sum is 51.

The spelling of 64642462006641 in words is "sixty-four trillion, six hundred forty-two billion, four hundred sixty-two million, six thousand, six hundred forty-one".