64611322703555 has 4 divisors (see below), whose sum is σ = 77533587244272. Its totient is φ = 51689058162840.

The previous prime is 64611322703539. The next prime is 64611322703591. The reversal of 64611322703555 is 55530722311646.

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

It is not a de Polignac number, because 64611322703555 - 2⁴ = 64611322703539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6461132270351 + ... + 6461132270360.

It is an arithmetic number, because the mean of its divisors is an integer number (19383396811068).

Almost surely, 2^{64611322703555} is an apocalyptic number.

64611322703555 is a deficient number, since it is larger than the sum of its proper divisors (12922264540717).

64611322703555 is a wasteful number, since it uses less digits than its factorization.

64611322703555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12922264540716.

The product of its (nonzero) digits is 4536000, while the sum is 50.

The spelling of 64611322703555 in words is "sixty-four trillion, six hundred eleven billion, three hundred twenty-two million, seven hundred three thousand, five hundred fifty-five".