64896534279487 has 16 divisors (see below), whose sum is σ = 69622434070560. Its totient is φ = 60275203411968.

The previous prime is 64896534279427. The next prime is 64896534279527. The reversal of 64896534279487 is 78497243569846.

It is not a de Polignac number, because 64896534279487 - 2¹⁹ = 64896533755199 is a prime.

It is a super-2 number, since 2×64896534279487² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64896534279487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64896534279427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56135412 + ... + 57279817.

It is an arithmetic number, because the mean of its divisors is an integer number (4351402129410).

Almost surely, 2^{64896534279487} is an apocalyptic number.

64896534279487 is a deficient number, since it is larger than the sum of its proper divisors (4725899791073).

64896534279487 is a wasteful number, since it uses less digits than its factorization.

64896534279487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113415690.

The product of its digits is 17557585920, while the sum is 82.

The spelling of 64896534279487 in words is "sixty-four trillion, eight hundred ninety-six billion, five hundred thirty-four million, two hundred seventy-nine thousand, four hundred eighty-seven".