649758040799 has 16 divisors (see below), whose sum is σ = 784025383680. Its totient is φ = 526029007680.

The previous prime is 649758040793. The next prime is 649758040843. The reversal of 649758040799 is 997040857946.

It is a cyclic number.

It is not a de Polignac number, because 649758040799 - 2⁴ = 649758040783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649758040793) 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, 7335734 + ... + 7423779.

It is an arithmetic number, because the mean of its divisors is an integer number (49001586480).

Almost surely, 2^649758040799 is an apocalyptic number.

649758040799 is a deficient number, since it is larger than the sum of its proper divisors (134267342881).

649758040799 is a wasteful number, since it uses less digits than its factorization.

649758040799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14759870.

The product of its (nonzero) digits is 137168640, while the sum is 68.

The spelling of 649758040799 in words is "six hundred forty-nine billion, seven hundred fifty-eight million, forty thousand, seven hundred ninety-nine".