64987895407 has 4 divisors (see below), whose sum is σ = 64993306456. Its totient is φ = 64982484360.

The previous prime is 64987895359. The next prime is 64987895411. The reversal of 64987895407 is 70459878946.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64987895407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64987895437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2687469 + ... + 2711542.

It is an arithmetic number, because the mean of its divisors is an integer number (16248326614).

Almost surely, 2^64987895407 is an apocalyptic number.

64987895407 is a deficient number, since it is larger than the sum of its proper divisors (5411049).

64987895407 is a wasteful number, since it uses less digits than its factorization.

64987895407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5411048.

The product of its (nonzero) digits is 121927680, while the sum is 67.

The spelling of 64987895407 in words is "sixty-four billion, nine hundred eighty-seven million, eight hundred ninety-five thousand, four hundred seven".