77618112225 has 24 divisors (see below), whose sum is σ = 128502355680. Its totient is φ = 41340280320.

The previous prime is 77618112223. The next prime is 77618112233. The reversal of 77618112225 is 52221181677.

It is not a de Polignac number, because 77618112225 - 2¹ = 77618112223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77618112223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 644784 + ... + 755633.

It is an arithmetic number, because the mean of its divisors is an integer number (5354264820).

Almost surely, 2^77618112225 is an apocalyptic number.

77618112225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77618112225 is a deficient number, since it is larger than the sum of its proper divisors (50884243455).

77618112225 is a wasteful number, since it uses less digits than its factorization.

77618112225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401169 (or 1401164 counting only the distinct ones).

The product of its digits is 94080, while the sum is 42.

The spelling of 77618112225 in words is "seventy-seven billion, six hundred eighteen million, one hundred twelve thousand, two hundred twenty-five".