77811053325 has 24 divisors (see below), whose sum is σ = 134240985408. Its totient is φ = 39694913280.

The previous prime is 77811053323. The next prime is 77811053351. The reversal of 77811053325 is 52335011877.

It is a happy number.

It is not a de Polignac number, because 77811053325 - 2¹ = 77811053323 is a prime.

It is a super-3 number, since 3×77811053325³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77811053323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22552204 + ... + 22555653.

It is an arithmetic number, because the mean of its divisors is an integer number (5593374392).

Almost surely, 2^77811053325 is an apocalyptic number.

77811053325 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77811053325 is a deficient number, since it is larger than the sum of its proper divisors (56429932083).

77811053325 is a wasteful number, since it uses less digits than its factorization.

77811053325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45107893 (or 45107888 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 77811053325 in words is "seventy-seven billion, eight hundred eleven million, fifty-three thousand, three hundred twenty-five".