47809832618 has 4 divisors (see below), whose sum is σ = 71714748930. Its totient is φ = 23904916308.

The previous prime is 47809832617. The next prime is 47809832647. The reversal of 47809832618 is 81623890874.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 44963930209 + 2845902409 = 212047^2 + 53347^2 .

It is a super-2 number, since 2×47809832618² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47809832611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11952458153 + ... + 11952458156.

Almost surely, 2^47809832618 is an apocalyptic number.

47809832618 is a deficient number, since it is larger than the sum of its proper divisors (23904916312).

47809832618 is a wasteful number, since it uses less digits than its factorization.

47809832618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23904916311.

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 47809832618 in words is "forty-seven billion, eight hundred nine million, eight hundred thirty-two thousand, six hundred eighteen".