77311144253 has 4 divisors (see below), whose sum is σ = 88355593440. Its totient is φ = 66266695068.

The previous prime is 77311144201. The next prime is 77311144279. The reversal of 77311144253 is 35244111377.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35244111377 = 71887 ⋅490271.

It is not a de Polignac number, because 77311144253 - 2⁶ = 77311144189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77311144453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5522224583 + ... + 5522224596.

It is an arithmetic number, because the mean of its divisors is an integer number (22088898360).

Almost surely, 2^77311144253 is an apocalyptic number.

It is an amenable number.

77311144253 is a deficient number, since it is larger than the sum of its proper divisors (11044449187).

77311144253 is a wasteful number, since it uses less digits than its factorization.

77311144253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11044449186.

The product of its digits is 70560, while the sum is 38.

The spelling of 77311144253 in words is "seventy-seven billion, three hundred eleven million, one hundred forty-four thousand, two hundred fifty-three".