47511356842 has 8 divisors (see below), whose sum is σ = 71398768932. Its totient is φ = 23711767200.

The previous prime is 47511356831. The next prime is 47511356909. The reversal of 47511356842 is 24865311574.

It is a Cunningham number, because it is equal to 217971²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 47511356841 + 1 = 217971^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 47511356792 and 47511356801.

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, 21954259 + ... + 21956422.

Almost surely, 2^47511356842 is an apocalyptic number.

47511356842 is a deficient number, since it is larger than the sum of its proper divisors (23887412090).

47511356842 is a wasteful number, since it uses less digits than its factorization.

47511356842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43911224.

The product of its digits is 806400, while the sum is 46.

The spelling of 47511356842 in words is "forty-seven billion, five hundred eleven million, three hundred fifty-six thousand, eight hundred forty-two".