2646471825 has 72 divisors (see below), whose sum is σ = 4927259040. Its totient is φ = 1392580800.

The previous prime is 2646471823. The next prime is 2646471853. The reversal of 2646471825 is 5281746462.

2646471825 is a `hidden beast` number, since 2 + 6 + 464 + 7 + 182 + 5 = 666.

It is not a de Polignac number, because 2646471825 - 2¹ = 2646471823 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (2646471823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 15297439 + ... + 15297611.

Almost surely, 2^2646471825 is an apocalyptic number.

2646471825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2646471825 is a deficient number, since it is larger than the sum of its proper divisors (2280787215).

2646471825 is a wasteful number, since it uses less digits than its factorization.

2646471825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 312 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 2646471825 is about 51443.8706261494. The cubic root of 2646471825 is about 1383.2130943378.

It can be divided in two parts, 26464 and 71825, that added together give a palindrome (98289).

The spelling of 2646471825 in words is "two billion, six hundred forty-six million, four hundred seventy-one thousand, eight hundred twenty-five".