47820899581 has 64 divisors (see below), whose sum is σ = 65323238400. Its totient is φ = 33907838976.

The previous prime is 47820899561. The next prime is 47820899591. The reversal of 47820899581 is 18599802874.

It is a cyclic number.

It is not a de Polignac number, because 47820899581 - 2¹⁷ = 47820768509 is a prime.

It is a super-2 number, since 2×47820899581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47820899501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8145115 + ... + 8150983.

It is an arithmetic number, because the mean of its divisors is an integer number (1020675600).

Almost surely, 2^47820899581 is an apocalyptic number.

It is an amenable number.

47820899581 is a deficient number, since it is larger than the sum of its proper divisors (17502338819).

47820899581 is a wasteful number, since it uses less digits than its factorization.

47820899581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6158.

The product of its (nonzero) digits is 11612160, while the sum is 61.

The spelling of 47820899581 in words is "forty-seven billion, eight hundred twenty million, eight hundred ninety-nine thousand, five hundred eighty-one".