47399918257 has 2 divisors, whose sum is σ = 47399918258. Its totient is φ = 47399918256.

The previous prime is 47399918249. The next prime is 47399918261. The reversal of 47399918257 is 75281999374.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47398079521 + 1838736 = 217711^2 + 1356^2 .

It is a cyclic number.

It is not a de Polignac number, because 47399918257 - 2³ = 47399918249 is a prime.

It is not a weakly prime, because it can be changed into another prime (47399918287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23699959128 + 23699959129.

It is an arithmetic number, because the mean of its divisors is an integer number (23699959129).

Almost surely, 2^47399918257 is an apocalyptic number.

It is an amenable number.

47399918257 is a deficient number, since it is larger than the sum of its proper divisors (1).

47399918257 is an equidigital number, since it uses as much as digits as its factorization.

47399918257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34292160, while the sum is 64.

The spelling of 47399918257 in words is "forty-seven billion, three hundred ninety-nine million, nine hundred eighteen thousand, two hundred fifty-seven".