64681013650 has 48 divisors (see below), whose sum is σ = 131373341568. Its totient is φ = 23497128000.

The previous prime is 64681013633. The next prime is 64681013651. The reversal of 64681013650 is 5631018646.

It is not an unprimeable number, because it can be changed into a prime (64681013651) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 503959 + ... + 619141.

It is an arithmetic number, because the mean of its divisors is an integer number (2736944616).

Almost surely, 2^64681013650 is an apocalyptic number.

64681013650 is an abundant number, since it is smaller than the sum of its proper divisors (66692327918).

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

64681013650 is a wasteful number, since it uses less digits than its factorization.

64681013650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116227 (or 116222 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 64681013650 in words is "sixty-four billion, six hundred eighty-one million, thirteen thousand, six hundred fifty".