12171477960 has 80 divisors (see below), whose sum is σ = 40909700700. Its totient is φ = 3245726592.

The previous prime is 12171477949. The next prime is 12171477971. The reversal of 12171477960 is 6977417121.

12171477960 is a `hidden beast` number, since 1 + 2 + 171 + 477 + 9 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (12171477949) and next prime (12171477971).

It can be written as a sum of positive squares in 2 ways, for example, as 10641572964 + 1529904996 = 103158^2 + 39114^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1875075 + ... + 1881554.

Almost surely, 2^12171477960 is an apocalyptic number.

12171477960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12171477960 is an abundant number, since it is smaller than the sum of its proper divisors (28738222740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12171477960 is a wasteful number, since it uses less digits than its factorization.

12171477960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3756652 (or 3756639 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 45.

The spelling of 12171477960 in words is "twelve billion, one hundred seventy-one million, four hundred seventy-seven thousand, nine hundred sixty".