48778687777 has 2 divisors, whose sum is σ = 48778687778. Its totient is φ = 48778687776.

The previous prime is 48778687733. The next prime is 48778687807. The reversal of 48778687777 is 77778687784.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43307274816 + 5471412961 = 208104^2 + 73969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-48778687777 is a prime.

It is not a weakly prime, because it can be changed into another prime (48778685777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24389343888 + 24389343889.

It is an arithmetic number, because the mean of its divisors is an integer number (24389343889).

Almost surely, 2^48778687777 is an apocalyptic number.

It is an amenable number.

48778687777 is a deficient number, since it is larger than the sum of its proper divisors (1).

48778687777 is an equidigital number, since it uses as much as digits as its factorization.

48778687777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1445670912, while the sum is 76.

The spelling of 48778687777 in words is "forty-eight billion, seven hundred seventy-eight million, six hundred eighty-seven thousand, seven hundred seventy-seven".