64934613920 has 48 divisors (see below), whose sum is σ = 167354214048. Its totient is φ = 23612586240.

The previous prime is 64934613899. The next prime is 64934613923. The reversal of 64934613920 is 2931643946.

It is not an unprimeable number, because it can be changed into a prime (64934613923) 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 7 ways as a sum of consecutive naturals, for example, 18445574 + ... + 18449093.

It is an arithmetic number, because the mean of its divisors is an integer number (3486546126).

Almost surely, 2^64934613920 is an apocalyptic number.

It is an amenable number.

64934613920 is an abundant number, since it is smaller than the sum of its proper divisors (102419600128).

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

64934613920 is a wasteful number, since it uses less digits than its factorization.

64934613920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36894693 (or 36894685 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 47.

The spelling of 64934613920 in words is "sixty-four billion, nine hundred thirty-four million, six hundred thirteen thousand, nine hundred twenty".