77425052477 has 4 divisors (see below), whose sum is σ = 77456363100. Its totient is φ = 77393741856.

The previous prime is 77425052443. The next prime is 77425052503.

77425052477 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19404768601 + 58020283876 = 139301^2 + 240874^2 .

It is a cyclic number.

It is not a de Polignac number, because 77425052477 - 2⁶ = 77425052413 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 (77425051477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15651602 + ... + 15656547.

It is an arithmetic number, because the mean of its divisors is an integer number (19364090775).

Almost surely, 2^77425052477 is an apocalyptic number.

It is an amenable number.

77425052477 is a deficient number, since it is larger than the sum of its proper divisors (31310623).

77425052477 is a wasteful number, since it uses less digits than its factorization.

77425052477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31310622.

The product of its (nonzero) digits is 3841600, while the sum is 50.

The spelling of 77425052477 in words is "seventy-seven billion, four hundred twenty-five million, fifty-two thousand, four hundred seventy-seven".