649711727420 has 48 divisors (see below), whose sum is σ = 1609608419328. Its totient is φ = 215572553280.

The previous prime is 649711727393. The next prime is 649711727449. The reversal of 649711727420 is 24727117946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74847242 + ... + 74855921.

It is an arithmetic number, because the mean of its divisors is an integer number (33533508736).

Almost surely, 2^649711727420 is an apocalyptic number.

It is an amenable number.

649711727420 is an abundant number, since it is smaller than the sum of its proper divisors (959896691908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649711727420 is a wasteful number, since it uses less digits than its factorization.

649711727420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149703210 (or 149703208 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 649711727420 in words is "six hundred forty-nine billion, seven hundred eleven million, seven hundred twenty-seven thousand, four hundred twenty".