47531566645 has 4 divisors (see below), whose sum is σ = 57037879980. Its totient is φ = 38025253312.

The previous prime is 47531566627. The next prime is 47531566651. The reversal of 47531566645 is 54666513574.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5651581329 + 41879985316 = 75177^2 + 204646^2 .

It is a cyclic number.

It is not a de Polignac number, because 47531566645 - 2³⁵ = 13171828277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47531566592 and 47531566601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4753156660 + ... + 4753156669.

It is an arithmetic number, because the mean of its divisors is an integer number (14259469995).

Almost surely, 2^47531566645 is an apocalyptic number.

It is an amenable number.

47531566645 is a deficient number, since it is larger than the sum of its proper divisors (9506313335).

47531566645 is an equidigital number, since it uses as much as digits as its factorization.

47531566645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9506313334.

The product of its digits is 9072000, while the sum is 52.

The spelling of 47531566645 in words is "forty-seven billion, five hundred thirty-one million, five hundred sixty-six thousand, six hundred forty-five".