649629016 has 16 divisors (see below), whose sum is σ = 1238023440. Its totient is φ = 319489440.

The previous prime is 649629011. The next prime is 649629031. The reversal of 649629016 is 610926946.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649629011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665116 + ... + 666091.

It is an arithmetic number, because the mean of its divisors is an integer number (77376465).

Almost surely, 2^649629016 is an apocalyptic number.

It is an amenable number.

649629016 is a deficient number, since it is larger than the sum of its proper divisors (588394424).

649629016 is a wasteful number, since it uses less digits than its factorization.

649629016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331274 (or 1331270 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 649629016 is about 25487.8209347131. The cubic root of 649629016 is about 866.0742735430.

The spelling of 649629016 in words is "six hundred forty-nine million, six hundred twenty-nine thousand, sixteen".