649448907503 has 24 divisors (see below), whose sum is σ = 723669696288. Its totient is φ = 582336920000.

The previous prime is 649448907479. The next prime is 649448907509. The reversal of 649448907503 is 305709844946.

It is a de Polignac number, because none of the positive numbers 2^k-649448907503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649448907509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3113093 + ... + 3315153.

It is an arithmetic number, because the mean of its divisors is an integer number (30152904012).

Almost surely, 2^649448907503 is an apocalyptic number.

649448907503 is a deficient number, since it is larger than the sum of its proper divisors (74220788785).

649448907503 is a wasteful number, since it uses less digits than its factorization.

649448907503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202447 (or 202436 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 59.

The spelling of 649448907503 in words is "six hundred forty-nine billion, four hundred forty-eight million, nine hundred seven thousand, five hundred three".