64611777188713 has 4 divisors (see below), whose sum is σ = 64684620230400. Its totient is φ = 64538934147028.

The previous prime is 64611777188689. The next prime is 64611777188743. The reversal of 64611777188713 is 31788177711646.

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-64611777188713 is a prime.

It is a super-2 number, since 2×64611777188713² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64611777188743) 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, 36421519513 + ... + 36421521286.

It is an arithmetic number, because the mean of its divisors is an integer number (16171155057600).

Almost surely, 2^{64611777188713} is an apocalyptic number.

It is an amenable number.

64611777188713 is a deficient number, since it is larger than the sum of its proper divisors (72843041687).

64611777188713 is an equidigital number, since it uses as much as digits as its factorization.

64611777188713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72843041686.

The product of its digits is 66382848, while the sum is 67.

The spelling of 64611777188713 in words is "sixty-four trillion, six hundred eleven billion, seven hundred seventy-seven million, one hundred eighty-eight thousand, seven hundred thirteen".