12047555817 has 72 divisors (see below), whose sum is σ = 19953224928. Its totient is φ = 7263717120.

The previous prime is 12047555789. The next prime is 12047555827. The reversal of 12047555817 is 71855574021.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

12047555817 is a `hidden beast` number, since 1 + 20 + 4 + 75 + 558 + 1 + 7 = 666.

It is not a de Polignac number, because 12047555817 - 2¹¹ = 12047553769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12047555827) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 62422473 + ... + 62422665.

It is an arithmetic number, because the mean of its divisors is an integer number (277128124).

Almost surely, 2^12047555817 is an apocalyptic number.

It is an amenable number.

12047555817 is a deficient number, since it is larger than the sum of its proper divisors (7905669111).

12047555817 is an frugal number, since it uses more digits than its factorization.

12047555817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 392000, while the sum is 45.

The spelling of 12047555817 in words is "twelve billion, forty-seven million, five hundred fifty-five thousand, eight hundred seventeen".