47869646857 has 4 divisors (see below), whose sum is σ = 47870424576. Its totient is φ = 47868869140.

The previous prime is 47869646837. The next prime is 47869646887. The reversal of 47869646857 is 75864696874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47869646857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47869646827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287773 + ... + 422554.

It is an arithmetic number, because the mean of its divisors is an integer number (11967606144).

Almost surely, 2^47869646857 is an apocalyptic number.

It is an amenable number.

47869646857 is a deficient number, since it is larger than the sum of its proper divisors (777719).

47869646857 is an equidigital number, since it uses as much as digits as its factorization.

47869646857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777718.

The product of its digits is 487710720, while the sum is 70.

The spelling of 47869646857 in words is "forty-seven billion, eight hundred sixty-nine million, six hundred forty-six thousand, eight hundred fifty-seven".