649336499520 has 56 divisors (see below), whose sum is σ = 2061643389024. Its totient is φ = 173156399616.

The previous prime is 649336499473. The next prime is 649336499527. The reversal of 649336499520 is 25994633946.

649336499520 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649336499527) 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, 338195134 + ... + 338197053.

Almost surely, 2^649336499520 is an apocalyptic number.

649336499520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

649336499520 is an abundant number, since it is smaller than the sum of its proper divisors (1412306889504).

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

649336499520 is a wasteful number, since it uses less digits than its factorization.

649336499520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676392207 (or 676392197 counting only the distinct ones).

The product of its (nonzero) digits is 37791360, while the sum is 60.

The spelling of 649336499520 in words is "six hundred forty-nine billion, three hundred thirty-six million, four hundred ninety-nine thousand, five hundred twenty".