47242127857581 has 6 divisors (see below), whose sum is σ = 68238629127630. Its totient is φ = 31494751905048.

The previous prime is 47242127857549. The next prime is 47242127857591. The reversal of 47242127857581 is 18575872124274.

47242127857581 is a `hidden beast` number, since 4 + 7 + 2 + 4 + 21 + 27 + 8 + 5 + 7 + 581 = 666.

It can be written as a sum of positive squares in only one way, i.e., 32973905928681 + 14268221928900 = 5742291^2 + 3777330^2 .

It is not a de Polignac number, because 47242127857581 - 2⁵ = 47242127857549 is a prime.

It is a super-2 number, since 2×47242127857581² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47242127857501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2624562658746 + ... + 2624562658763.

It is an arithmetic number, because the mean of its divisors is an integer number (11373104854605).

Almost surely, 2^{47242127857581} is an apocalyptic number.

It is an amenable number.

47242127857581 is a deficient number, since it is larger than the sum of its proper divisors (20996501270049).

47242127857581 is a wasteful number, since it uses less digits than its factorization.

47242127857581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5249125317515 (or 5249125317512 counting only the distinct ones).

The product of its digits is 70246400, while the sum is 63.

The spelling of 47242127857581 in words is "forty-seven trillion, two hundred forty-two billion, one hundred twenty-seven million, eight hundred fifty-seven thousand, five hundred eighty-one".