47806993521 has 36 divisors (see below), whose sum is σ = 82196901072. Its totient is φ = 26682962544.

The previous prime is 47806993517. The next prime is 47806993523. The reversal of 47806993521 is 12539960874.

47806993521 is a `hidden beast` number, since 478 + 0 + 69 + 93 + 5 + 21 = 666.

It is not a de Polignac number, because 47806993521 - 2² = 47806993517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47806993523) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1241571 + ... + 1279496.

It is an arithmetic number, because the mean of its divisors is an integer number (2283247252).

It is a 2-persistent number, because it is pandigital, and so is 2⋅47806993521 = 95613987042, but 3⋅47806993521 = 143420980563 is not.

Almost surely, 2^47806993521 is an apocalyptic number.

It is an amenable number.

47806993521 is a deficient number, since it is larger than the sum of its proper divisors (34389907551).

47806993521 is a wasteful number, since it uses less digits than its factorization.

47806993521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521130 (or 2521120 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 47806993521 in words is "forty-seven billion, eight hundred six million, nine hundred ninety-three thousand, five hundred twenty-one".