47815983409 has 4 divisors (see below), whose sum is σ = 48024787060. Its totient is φ = 47607179760.

The previous prime is 47815983407. The next prime is 47815983431. The reversal of 47815983409 is 90438951874.

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 32916119184 + 14899864225 = 181428^2 + 122065^2 .

It is a cyclic number.

It is not a de Polignac number, because 47815983409 - 2¹ = 47815983407 is a prime.

It is a super-2 number, since 2×47815983409² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47815983401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104401482 + ... + 104401939.

It is an arithmetic number, because the mean of its divisors is an integer number (12006196765).

Almost surely, 2^47815983409 is an apocalyptic number.

It is an amenable number.

47815983409 is a deficient number, since it is larger than the sum of its proper divisors (208803651).

47815983409 is a wasteful number, since it uses less digits than its factorization.

47815983409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208803650.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 47815983409 in words is "forty-seven billion, eight hundred fifteen million, nine hundred eighty-three thousand, four hundred nine".