77725271051 has 4 divisors (see below), whose sum is σ = 77763392400. Its totient is φ = 77687149704.

The previous prime is 77725271009. The next prime is 77725271077. The reversal of 77725271051 is 15017252777.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77725271051 - 2¹⁰ = 77725270027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77725270993 and 77725271011.

It is not an unprimeable number, because it can be changed into a prime (77725271251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19057616 + ... + 19061693.

It is an arithmetic number, because the mean of its divisors is an integer number (19440848100).

Almost surely, 2^77725271051 is an apocalyptic number.

77725271051 is a deficient number, since it is larger than the sum of its proper divisors (38121349).

77725271051 is a wasteful number, since it uses less digits than its factorization.

77725271051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38121348.

The product of its (nonzero) digits is 240100, while the sum is 44.

The spelling of 77725271051 in words is "seventy-seven billion, seven hundred twenty-five million, two hundred seventy-one thousand, fifty-one".