77728705222543 has 8 divisors (see below), whose sum is σ = 83722473190400. Its totient is φ = 71925215602968.

The previous prime is 77728705222541. The next prime is 77728705222561. The reversal of 77728705222543 is 34522250782777.

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 77728705222543 - 2¹ = 77728705222541 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 (77728705222541) 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, 47569586223 + ... + 47569587856.

It is an arithmetic number, because the mean of its divisors is an integer number (10465309148800).

Almost surely, 2^{77728705222543} is an apocalyptic number.

77728705222543 is a deficient number, since it is larger than the sum of its proper divisors (5993767967857).

77728705222543 is a wasteful number, since it uses less digits than its factorization.

77728705222543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95139174141.

The product of its (nonzero) digits is 92198400, while the sum is 61.

The spelling of 77728705222543 in words is "seventy-seven trillion, seven hundred twenty-eight billion, seven hundred five million, two hundred twenty-two thousand, five hundred forty-three".