47109715821 has 12 divisors (see below), whose sum is σ = 77768419872. Its totient is φ = 26919837576.

The previous prime is 47109715817. The next prime is 47109715837. The reversal of 47109715821 is 12851790174.

It is a happy number.

47109715821 is a `hidden beast` number, since 471 + 0 + 9 + 7 + 158 + 21 = 666.

It is not a de Polignac number, because 47109715821 - 2² = 47109715817 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47109715421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 373886571 + ... + 373886696.

It is an arithmetic number, because the mean of its divisors is an integer number (6480701656).

Almost surely, 2^47109715821 is an apocalyptic number.

It is an amenable number.

47109715821 is a deficient number, since it is larger than the sum of its proper divisors (30658704051).

47109715821 is a wasteful number, since it uses less digits than its factorization.

47109715821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747773280 (or 747773277 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The spelling of 47109715821 in words is "forty-seven billion, one hundred nine million, seven hundred fifteen thousand, eight hundred twenty-one".