2656343221425 has 24 divisors (see below), whose sum is σ = 4879800882080. Its totient is φ = 1416716384400.

The previous prime is 2656343221409. The next prime is 2656343221459. The reversal of 2656343221425 is 5241223436562.

2656343221425 is a `hidden beast` number, since 2 + 6 + 5 + 634 + 3 + 2 + 2 + 1 + 4 + 2 + 5 = 666.

2656343221425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2656343221425 - 2⁴ = 2656343221409 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 1967660971 + ... + 1967662320.

Almost surely, 2^{2656343221425} is an apocalyptic number.

2656343221425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2656343221425 is a deficient number, since it is larger than the sum of its proper divisors (2223457660655).

2656343221425 is a wasteful number, since it uses less digits than its factorization.

2656343221425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935323310 (or 3935323299 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 45.

Adding to 2656343221425 its reverse (5241223436562), we get a palindrome (7897566657987).

The spelling of 2656343221425 in words is "two trillion, six hundred fifty-six billion, three hundred forty-three million, two hundred twenty-one thousand, four hundred twenty-five".