64768760505 has 48 divisors (see below), whose sum is σ = 118074018816. Its totient is φ = 32798263680.

The previous prime is 64768760491. The next prime is 64768760549. The reversal of 64768760505 is 50506786746.

64768760505 is a `hidden beast` number, since 6 + 4 + 7 + 68 + 76 + 0 + 505 = 666.

64768760505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64768760505 - 2¹³ = 64768752313 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 364077 + ... + 511946.

It is an arithmetic number, because the mean of its divisors is an integer number (2459875392).

Almost surely, 2^64768760505 is an apocalyptic number.

It is an amenable number.

64768760505 is a deficient number, since it is larger than the sum of its proper divisors (53305258311).

64768760505 is a wasteful number, since it uses less digits than its factorization.

64768760505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876118 (or 876115 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 64768760505 in words is "sixty-four billion, seven hundred sixty-eight million, seven hundred sixty thousand, five hundred five".