77774040808 has 32 divisors (see below), whose sum is σ = 148394553120. Its totient is φ = 38208040000.

The previous prime is 77774040797. The next prime is 77774040857. The reversal of 77774040808 is 80804047777.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 261538 + ... + 473233.

It is an arithmetic number, because the mean of its divisors is an integer number (4637329785).

Almost surely, 2^77774040808 is an apocalyptic number.

It is an amenable number.

77774040808 is a deficient number, since it is larger than the sum of its proper divisors (70620512312).

77774040808 is a wasteful number, since it uses less digits than its factorization.

77774040808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735009 (or 735005 counting only the distinct ones).

The product of its (nonzero) digits is 2458624, while the sum is 52.

The spelling of 77774040808 in words is "seventy-seven billion, seven hundred seventy-four million, forty thousand, eight hundred eight".