64644026226023 has 4 divisors (see below), whose sum is σ = 64835848262640. Its totient is φ = 64452204189408.

The previous prime is 64644026225959. The next prime is 64644026226053. The reversal of 64644026226023 is 32062262044646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64644026226023 - 2⁶ = 64644026225959 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 (64644026226053) 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, 95911017803 + ... + 95911018476.

It is an arithmetic number, because the mean of its divisors is an integer number (16208962065660).

Almost surely, 2^{64644026226023} is an apocalyptic number.

64644026226023 is a deficient number, since it is larger than the sum of its proper divisors (191822036617).

64644026226023 is a wasteful number, since it uses less digits than its factorization.

64644026226023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191822036616.

The product of its (nonzero) digits is 3981312, while the sum is 47.

The spelling of 64644026226023 in words is "sixty-four trillion, six hundred forty-four billion, twenty-six million, two hundred twenty-six thousand, twenty-three".