64785768077 has 8 divisors (see below), whose sum is σ = 65185705536. Its totient is φ = 64385973792.

The previous prime is 64785768037. The next prime is 64785768079. The reversal of 64785768077 is 77086758746.

64785768077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64785768077 - 2⁶ = 64785768013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64785768079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 956393 + ... + 1021889.

It is an arithmetic number, because the mean of its divisors is an integer number (8148213192).

Almost surely, 2^64785768077 is an apocalyptic number.

It is an amenable number.

64785768077 is a deficient number, since it is larger than the sum of its proper divisors (399937459).

64785768077 is a wasteful number, since it uses less digits than its factorization.

64785768077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71587.

The product of its (nonzero) digits is 110638080, while the sum is 65.

The spelling of 64785768077 in words is "sixty-four billion, seven hundred eighty-five million, seven hundred sixty-eight thousand, seventy-seven".