12471771949 has 16 divisors (see below), whose sum is σ = 15544184320. Its totient is φ = 9742861440.

The previous prime is 12471771947. The next prime is 12471771959. The reversal of 12471771949 is 94917717421.

It is not a de Polignac number, because 12471771949 - 2¹ = 12471771947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12471771896 and 12471771905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12471771947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 860232 + ... + 874609.

It is an arithmetic number, because the mean of its divisors is an integer number (971511520).

Almost surely, 2^12471771949 is an apocalyptic number.

It is an amenable number.

12471771949 is a deficient number, since it is larger than the sum of its proper divisors (3072412371).

12471771949 is a wasteful number, since it uses less digits than its factorization.

12471771949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734940.

The product of its digits is 889056, while the sum is 52.

The spelling of 12471771949 in words is "twelve billion, four hundred seventy-one million, seven hundred seventy-one thousand, nine hundred forty-nine".