649678008720 has 160 divisors (see below), whose sum is σ = 2238890701824. Its totient is φ = 154761984000.

The previous prime is 649678008691. The next prime is 649678008767. The reversal of 649678008720 is 27800876946.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3261831 + ... + 3455270.

Almost surely, 2^649678008720 is an apocalyptic number.

649678008720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

649678008720 is an abundant number, since it is smaller than the sum of its proper divisors (1589212693104).

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

649678008720 is a wasteful number, since it uses less digits than its factorization.

649678008720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6717161 (or 6717155 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 57.

The spelling of 649678008720 in words is "six hundred forty-nine billion, six hundred seventy-eight million, eight thousand, seven hundred twenty".