28640261323 has 2 divisors, whose sum is σ = 28640261324. Its totient is φ = 28640261322.

The previous prime is 28640261311. The next prime is 28640261333. The reversal of 28640261323 is 32316204682.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28640261323 is a prime.

It is not a weakly prime, because it can be changed into another prime (28640261303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14320130661 + 14320130662.

It is an arithmetic number, because the mean of its divisors is an integer number (14320130662).

Almost surely, 2^28640261323 is an apocalyptic number.

28640261323 is a deficient number, since it is larger than the sum of its proper divisors (1).

28640261323 is an equidigital number, since it uses as much as digits as its factorization.

28640261323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 28640261323 in words is "twenty-eight billion, six hundred forty million, two hundred sixty-one thousand, three hundred twenty-three".