649054812791 has 16 divisors (see below), whose sum is σ = 811763942400. Its totient is φ = 504161530080.

The previous prime is 649054812743. The next prime is 649054812793. The reversal of 649054812791 is 197218450946.

It is a cyclic number.

It is not a de Polignac number, because 649054812791 - 2¹⁸ = 649054550647 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 (649054812793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13270991 + ... + 13319808.

It is an arithmetic number, because the mean of its divisors is an integer number (50735246400).

Almost surely, 2^649054812791 is an apocalyptic number.

649054812791 is a deficient number, since it is larger than the sum of its proper divisors (162709129609).

649054812791 is a wasteful number, since it uses less digits than its factorization.

649054812791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26591134.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 649054812791 in words is "six hundred forty-nine billion, fifty-four million, eight hundred twelve thousand, seven hundred ninety-one".