2642456321 has 4 divisors (see below), whose sum is σ = 2642679600. Its totient is φ = 2642233044.

The previous prime is 2642456291. The next prime is 2642456359. The reversal of 2642456321 is 1236542462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1236542462 = 2 ⋅618271231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2642456321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2642456381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92831 + ... + 117908.

It is an arithmetic number, because the mean of its divisors is an integer number (660669900).

Almost surely, 2^2642456321 is an apocalyptic number.

It is an amenable number.

2642456321 is a deficient number, since it is larger than the sum of its proper divisors (223279).

2642456321 is a wasteful number, since it uses less digits than its factorization.

2642456321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223278.

The product of its digits is 69120, while the sum is 35.

The square root of 2642456321 is about 51404.8277985638. The cubic root of 2642456321 is about 1382.5131549923.

Adding to 2642456321 its reverse (1236542462), we get a palindrome (3878998783).

The spelling of 2642456321 in words is "two billion, six hundred forty-two million, four hundred fifty-six thousand, three hundred twenty-one".