47780857871 has 4 divisors (see below), whose sum is σ = 47785089744. Its totient is φ = 47776626000.

The previous prime is 47780857853. The next prime is 47780857877. The reversal of 47780857871 is 17875808774.

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 47780857871 - 2²² = 47776663567 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 (47780857877) 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, 2098955 + ... + 2121596.

It is an arithmetic number, because the mean of its divisors is an integer number (11946272436).

Almost surely, 2^47780857871 is an apocalyptic number.

47780857871 is a deficient number, since it is larger than the sum of its proper divisors (4231873).

47780857871 is a wasteful number, since it uses less digits than its factorization.

47780857871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4231872.

The product of its (nonzero) digits is 24586240, while the sum is 62.

The spelling of 47780857871 in words is "forty-seven billion, seven hundred eighty million, eight hundred fifty-seven thousand, eight hundred seventy-one".