649911415387 has 4 divisors (see below), whose sum is σ = 699904601200. Its totient is φ = 599918229576.

The previous prime is 649911415381. The next prime is 649911415399. The reversal of 649911415387 is 783514119946.

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 649911415387 - 2¹⁵ = 649911382619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649911415381) 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, 24996592887 + ... + 24996592912.

It is an arithmetic number, because the mean of its divisors is an integer number (174976150300).

Almost surely, 2^649911415387 is an apocalyptic number.

649911415387 is a deficient number, since it is larger than the sum of its proper divisors (49993185813).

649911415387 is a wasteful number, since it uses less digits than its factorization.

649911415387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49993185812.

The product of its digits is 6531840, while the sum is 58.

The spelling of 649911415387 in words is "six hundred forty-nine billion, nine hundred eleven million, four hundred fifteen thousand, three hundred eighty-seven".