57878648871 has 4 divisors (see below), whose sum is σ = 77171531832. Its totient is φ = 38585765912.

The previous prime is 57878648813. The next prime is 57878648957. The reversal of 57878648871 is 17884687875.

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

It is a cyclic number.

It is not a de Polignac number, because 57878648871 - 2¹¹ = 57878646823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57878648796 and 57878648805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57878648371) 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 3 ways as a sum of consecutive naturals, for example, 9646441476 + ... + 9646441481.

It is an arithmetic number, because the mean of its divisors is an integer number (19292882958).

Almost surely, 2^57878648871 is an apocalyptic number.

57878648871 is a deficient number, since it is larger than the sum of its proper divisors (19292882961).

57878648871 is a wasteful number, since it uses less digits than its factorization.

57878648871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19292882960.

The product of its digits is 168591360, while the sum is 69.

The spelling of 57878648871 in words is "fifty-seven billion, eight hundred seventy-eight million, six hundred forty-eight thousand, eight hundred seventy-one".