47857623817 has 2 divisors, whose sum is σ = 47857623818. Its totient is φ = 47857623816.

The previous prime is 47857623809. The next prime is 47857623851. The reversal of 47857623817 is 71832675874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47688077376 + 169546441 = 218376^2 + 13021^2 .

It is a cyclic number.

It is not a de Polignac number, because 47857623817 - 2³ = 47857623809 is a prime.

It is not a weakly prime, because it can be changed into another prime (47857623217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23928811908 + 23928811909.

It is an arithmetic number, because the mean of its divisors is an integer number (23928811909).

Almost surely, 2^47857623817 is an apocalyptic number.

It is an amenable number.

47857623817 is a deficient number, since it is larger than the sum of its proper divisors (1).

47857623817 is an equidigital number, since it uses as much as digits as its factorization.

47857623817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15805440, while the sum is 58.

The spelling of 47857623817 in words is "forty-seven billion, eight hundred fifty-seven million, six hundred twenty-three thousand, eight hundred seventeen".