649908562593 has 8 divisors (see below), whose sum is σ = 874494702400. Its totient is φ = 429297398928.

The previous prime is 649908562559. The next prime is 649908562603. The reversal of 649908562593 is 395265809946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 649908562593 - 2⁸ = 649908562337 is a prime.

It is a super-2 number, since 2×649908562593² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649908562393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 993743653 + ... + 993744306.

It is an arithmetic number, because the mean of its divisors is an integer number (109311837800).

Almost surely, 2^649908562593 is an apocalyptic number.

It is an amenable number.

649908562593 is a deficient number, since it is larger than the sum of its proper divisors (224586139807).

649908562593 is a wasteful number, since it uses less digits than its factorization.

649908562593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987488071.

The product of its (nonzero) digits is 125971200, while the sum is 66.

The spelling of 649908562593 in words is "six hundred forty-nine billion, nine hundred eight million, five hundred sixty-two thousand, five hundred ninety-three".