649265562947 has 4 divisors (see below), whose sum is σ = 653936538360. Its totient is φ = 644594587536.

The previous prime is 649265562887. The next prime is 649265562949. The reversal of 649265562947 is 749265562946.

It is a happy number.

649265562947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 649265562947 - 2³⁸ = 374387656003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649265562949) 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, 2335487498 + ... + 2335487775.

It is an arithmetic number, because the mean of its divisors is an integer number (163484134590).

Almost surely, 2^649265562947 is an apocalyptic number.

649265562947 is a deficient number, since it is larger than the sum of its proper divisors (4670975413).

649265562947 is a wasteful number, since it uses less digits than its factorization.

649265562947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4670975412.

The product of its digits is 195955200, while the sum is 65.

Subtracting 649265562947 from its reverse (749265562946), we obtain a palindrome (99999999999).

The spelling of 649265562947 in words is "six hundred forty-nine billion, two hundred sixty-five million, five hundred sixty-two thousand, nine hundred forty-seven".