64761818433696 has 72 divisors (see below), whose sum is σ = 190107273492864. Its totient is φ = 20890909169280.

The previous prime is 64761818433679. The next prime is 64761818433721. The reversal of 64761818433696 is 69633481816746.

64761818433696 is a `hidden beast` number, since 6 + 4 + 7 + 6 + 181 + 8 + 433 + 6 + 9 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3626885026 + ... + 3626902881.

It is an arithmetic number, because the mean of its divisors is an integer number (2640378798512).

Almost surely, 2^{64761818433696} is an apocalyptic number.

It is an amenable number.

64761818433696 is an abundant number, since it is smaller than the sum of its proper divisors (125345455059168).

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

64761818433696 is a wasteful number, since it uses less digits than its factorization.

64761818433696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7253787954 (or 7253787943 counting only the distinct ones).

The product of its digits is 752467968, while the sum is 72.

The spelling of 64761818433696 in words is "sixty-four trillion, seven hundred sixty-one billion, eight hundred eighteen million, four hundred thirty-three thousand, six hundred ninety-six".