77728701784143 has 8 divisors (see below), whose sum is σ = 103829837012656. Its totient is φ = 51723350539200.

The previous prime is 77728701784141. The next prime is 77728701784147. The reversal of 77728701784143 is 34148710782777.

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

It is not a de Polignac number, because 77728701784143 - 2¹ = 77728701784141 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 (77728701784141) by changing a digit.

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, 23945993998 + ... + 23945997243.

It is an arithmetic number, because the mean of its divisors is an integer number (12978729626582).

Almost surely, 2^{77728701784143} is an apocalyptic number.

77728701784143 is a deficient number, since it is larger than the sum of its proper divisors (26101135228513).

77728701784143 is a wasteful number, since it uses less digits than its factorization.

77728701784143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47891991785.

The product of its (nonzero) digits is 103262208, while the sum is 66.

The spelling of 77728701784143 in words is "seventy-seven trillion, seven hundred twenty-eight billion, seven hundred one million, seven hundred eighty-four thousand, one hundred forty-three".