6401964785777 has 8 divisors (see below), whose sum is σ = 6986199353952. Its totient is φ = 5818103179200.

The previous prime is 6401964785731. The next prime is 6401964785791. The reversal of 6401964785777 is 7775874691046.

6401964785777 is digitally balanced in base 3, 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 6401964785777 - 2⁸ = 6401964785521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6401964785777.

It is not an unprimeable number, because it can be changed into a prime (6401964785717) 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, 93204503 + ... + 93273164.

It is an arithmetic number, because the mean of its divisors is an integer number (873274919244).

Almost surely, 2^{6401964785777} is an apocalyptic number.

It is an amenable number.

6401964785777 is a deficient number, since it is larger than the sum of its proper divisors (584234568175).

6401964785777 is a wasteful number, since it uses less digits than its factorization.

6401964785777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186480799.

The product of its (nonzero) digits is 497871360, while the sum is 71.

The spelling of 6401964785777 in words is "six trillion, four hundred one billion, nine hundred sixty-four million, seven hundred eighty-five thousand, seven hundred seventy-seven".