649676824487 has 4 divisors (see below), whose sum is σ = 665522600736. Its totient is φ = 633831048240.

The previous prime is 649676824483. The next prime is 649676824571. The reversal of 649676824487 is 784428676946.

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

It is a cyclic number.

It is not a de Polignac number, because 649676824487 - 2² = 649676824483 is a prime.

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 649676824487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649676824483) 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, 7922888063 + ... + 7922888144.

It is an arithmetic number, because the mean of its divisors is an integer number (166380650184).

Almost surely, 2^649676824487 is an apocalyptic number.

649676824487 is a deficient number, since it is larger than the sum of its proper divisors (15845776249).

649676824487 is a wasteful number, since it uses less digits than its factorization.

649676824487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15845776248.

The product of its digits is 780337152, while the sum is 71.

The spelling of 649676824487 in words is "six hundred forty-nine billion, six hundred seventy-six million, eight hundred twenty-four thousand, four hundred eighty-seven".