64442764623755 has 16 divisors (see below), whose sum is σ = 88416530714304. Its totient is φ = 44170383269760.

The previous prime is 64442764623709. The next prime is 64442764623767. The reversal of 64442764623755 is 55732646724446.

It is a de Polignac number, because none of the positive numbers 2^k-64442764623755 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64442764623691 and 64442764623700.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394522256 + ... + 394685565.

It is an arithmetic number, because the mean of its divisors is an integer number (5526033169644).

Almost surely, 2^{64442764623755} is an apocalyptic number.

64442764623755 is a deficient number, since it is larger than the sum of its proper divisors (23973766090549).

64442764623755 is a wasteful number, since it uses less digits than its factorization.

64442764623755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789210166.

The product of its digits is 812851200, while the sum is 65.

The spelling of 64442764623755 in words is "sixty-four trillion, four hundred forty-two billion, seven hundred sixty-four million, six hundred twenty-three thousand, seven hundred fifty-five".