64520768328472 has 32 divisors (see below), whose sum is σ = 123000145070400. Its totient is φ = 31722440121504.

The previous prime is 64520768328431. The next prime is 64520768328487. The reversal of 64520768328472 is 27482386702546.

It is a happy number.

64520768328472 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106602822 + ... + 107206357.

It is an arithmetic number, because the mean of its divisors is an integer number (3843754533450).

Almost surely, 2^{64520768328472} is an apocalyptic number.

It is an amenable number.

64520768328472 is a deficient number, since it is larger than the sum of its proper divisors (58479376741928).

64520768328472 is a wasteful number, since it uses less digits than its factorization.

64520768328472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213809815 (or 213809811 counting only the distinct ones).

The product of its (nonzero) digits is 216760320, while the sum is 64.

The spelling of 64520768328472 in words is "sixty-four trillion, five hundred twenty billion, seven hundred sixty-eight million, three hundred twenty-eight thousand, four hundred seventy-two".