48778687778 has 4 divisors (see below), whose sum is σ = 73168031670. Its totient is φ = 24389343888.

The previous prime is 48778687777. The next prime is 48778687807. The reversal of 48778687778 is 87778687784.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 33343855609 + 15434832169 = 182603^2 + 124237^2 .

It is a junction number, because it is equal to n+sod(n) for n = 48778687699 and 48778687708.

It is not an unprimeable number, because it can be changed into a prime (48778687777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12194671943 + ... + 12194671946.

Almost surely, 2^48778687778 is an apocalyptic number.

48778687778 is a deficient number, since it is larger than the sum of its proper divisors (24389343892).

48778687778 is a wasteful number, since it uses less digits than its factorization.

48778687778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24389343891.

The product of its digits is 1652195328, while the sum is 77.

The spelling of 48778687778 in words is "forty-eight billion, seven hundred seventy-eight million, six hundred eighty-seven thousand, seven hundred seventy-eight".