47177625581 has 2 divisors, whose sum is σ = 47177625582. Its totient is φ = 47177625580.

The previous prime is 47177625511. The next prime is 47177625617. The reversal of 47177625581 is 18552677174.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38590638025 + 8586987556 = 196445^2 + 92666^2 .

It is a cyclic number.

It is not a de Polignac number, because 47177625581 - 2¹⁸ = 47177363437 is a prime.

It is a super-2 number, since 2×47177625581² (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 (47177625511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23588812790 + 23588812791.

It is an arithmetic number, because the mean of its divisors is an integer number (23588812791).

Almost surely, 2^47177625581 is an apocalyptic number.

It is an amenable number.

47177625581 is a deficient number, since it is larger than the sum of its proper divisors (1).

47177625581 is an equidigital number, since it uses as much as digits as its factorization.

47177625581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3292800, while the sum is 53.

The spelling of 47177625581 in words is "forty-seven billion, one hundred seventy-seven million, six hundred twenty-five thousand, five hundred eighty-one".