64425926587 has 4 divisors (see below), whose sum is σ = 70282829016. Its totient is φ = 58569024160.

The previous prime is 64425926573. The next prime is 64425926651. The reversal of 64425926587 is 78562952446.

It is a happy number.

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-64425926587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64425926557) 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, 2928451198 + ... + 2928451219.

It is an arithmetic number, because the mean of its divisors is an integer number (17570707254).

Almost surely, 2^64425926587 is an apocalyptic number.

64425926587 is a deficient number, since it is larger than the sum of its proper divisors (5856902429).

64425926587 is a wasteful number, since it uses less digits than its factorization.

64425926587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5856902428.

The product of its digits is 29030400, while the sum is 58.

The spelling of 64425926587 in words is "sixty-four billion, four hundred twenty-five million, nine hundred twenty-six thousand, five hundred eighty-seven".