47878138775 has 6 divisors (see below), whose sum is σ = 59368892112. Its totient is φ = 38302511000.

The previous prime is 47878138771. The next prime is 47878138783. The reversal of 47878138775 is 57783187874.

It is not a de Polignac number, because 47878138775 - 2² = 47878138771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47878138771) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 957562751 + ... + 957562800.

It is an arithmetic number, because the mean of its divisors is an integer number (9894815352).

Almost surely, 2^47878138775 is an apocalyptic number.

47878138775 is a deficient number, since it is larger than the sum of its proper divisors (11490753337).

47878138775 is a wasteful number, since it uses less digits than its factorization.

47878138775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915125561 (or 1915125556 counting only the distinct ones).

The product of its digits is 73758720, while the sum is 65.

The spelling of 47878138775 in words is "forty-seven billion, eight hundred seventy-eight million, one hundred thirty-eight thousand, seven hundred seventy-five".