47657554181 has 2 divisors, whose sum is σ = 47657554182. Its totient is φ = 47657554180.

The previous prime is 47657554177. The next prime is 47657554207. The reversal of 47657554181 is 18145575674.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27892006081 + 19765548100 = 167009^2 + 140590^2 .

It is a cyclic number.

It is not a de Polignac number, because 47657554181 - 2² = 47657554177 is a prime.

It is a super-2 number, since 2×47657554181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47657554121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23828777090 + 23828777091.

It is an arithmetic number, because the mean of its divisors is an integer number (23828777091).

Almost surely, 2^47657554181 is an apocalyptic number.

It is an amenable number.

47657554181 is a deficient number, since it is larger than the sum of its proper divisors (1).

47657554181 is an equidigital number, since it uses as much as digits as its factorization.

47657554181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704000, while the sum is 53.

The spelling of 47657554181 in words is "forty-seven billion, six hundred fifty-seven million, five hundred fifty-four thousand, one hundred eighty-one".