77770000778 has 8 divisors (see below), whose sum is σ = 116656764672. Its totient is φ = 38884412556.

The previous prime is 77770000771. The next prime is 77770000783. The reversal of 77770000778 is 87700007777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77770000771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104000 + ... + 407867.

It is an arithmetic number, because the mean of its divisors is an integer number (14582095584).

Almost surely, 2^77770000778 is an apocalyptic number.

77770000778 is a deficient number, since it is larger than the sum of its proper divisors (38886763894).

77770000778 is a wasteful number, since it uses less digits than its factorization.

77770000778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587836.

The product of its (nonzero) digits is 941192, while the sum is 50.

The spelling of 77770000778 in words is "seventy-seven billion, seven hundred seventy million, seven hundred seventy-eight", and thus it is an aban number.