77749818 has 16 divisors (see below), whose sum is σ = 157630656. Its totient is φ = 25561440.

The previous prime is 77749813. The next prime is 77749853. The reversal of 77749818 is 81894777.

It is not an unprimeable number, because it can be changed into a prime (77749811) 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 7 ways as a sum of consecutive naturals, for example, 88318 + ... + 89193.

It is an arithmetic number, because the mean of its divisors is an integer number (9851916).

Almost surely, 2^77749818 is an apocalyptic number.

77749818 is an abundant number, since it is smaller than the sum of its proper divisors (79880838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77749818 is a wasteful number, since it uses less digits than its factorization.

77749818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177589.

The product of its digits is 790272, while the sum is 51.

The square root of 77749818 is about 8817.5857239950. The cubic root of 77749818 is about 426.8085659480.

The spelling of 77749818 in words is "seventy-seven million, seven hundred forty-nine thousand, eight hundred eighteen".