2657171412 has 144 divisors (see below), whose sum is σ = 8200758720. Its totient is φ = 741472704.

The previous prime is 2657171411. The next prime is 2657171431. The reversal of 2657171412 is 2141717562.

2657171412 is a `hidden beast` number, since 2 + 6 + 571 + 71 + 4 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2657171411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221718 + ... + 233394.

Almost surely, 2^2657171412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2657171412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4100379360).

2657171412 is an abundant number, since it is smaller than the sum of its proper divisors (5543587308).

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

2657171412 is a wasteful number, since it uses less digits than its factorization.

2657171412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11747 (or 11732 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 2657171412 is about 51547.7585545676. The cubic root of 2657171412 is about 1385.0746808162.

Adding to 2657171412 its reverse (2141717562), we get a palindrome (4798888974).

The spelling of 2657171412 in words is "two billion, six hundred fifty-seven million, one hundred seventy-one thousand, four hundred twelve".