64511671504015 has 16 divisors (see below), whose sum is σ = 78815467856160. Its totient is φ = 50677014952960.

The previous prime is 64511671503977. The next prime is 64511671504019. The reversal of 64511671504015 is 51040517611546.

64511671504015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64511671504015 - 2¹⁹ = 64511670979727 is a prime.

It is a super-2 number, since 2×64511671504015² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64511671504019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123851134 + ... + 124370923.

It is an arithmetic number, because the mean of its divisors is an integer number (4925966741010).

Almost surely, 2^{64511671504015} is an apocalyptic number.

64511671504015 is a deficient number, since it is larger than the sum of its proper divisors (14303796352145).

64511671504015 is a wasteful number, since it uses less digits than its factorization.

64511671504015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248223002.

The product of its (nonzero) digits is 504000, while the sum is 46.

The spelling of 64511671504015 in words is "sixty-four trillion, five hundred eleven billion, six hundred seventy-one million, five hundred four thousand, fifteen".