28640433525551 has 2 divisors, whose sum is σ = 28640433525552. Its totient is φ = 28640433525550.

The previous prime is 28640433525533. The next prime is 28640433525731. The reversal of 28640433525551 is 15552533404682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28640433525551 - 2³⁴ = 28623253656367 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28640433525493 and 28640433525502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28640433525251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14320216762775 + 14320216762776.

It is an arithmetic number, because the mean of its divisors is an integer number (14320216762776).

Almost surely, 2^{28640433525551} is an apocalyptic number.

28640433525551 is a deficient number, since it is larger than the sum of its proper divisors (1).

28640433525551 is an equidigital number, since it uses as much as digits as its factorization.

28640433525551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280000, while the sum is 53.

The spelling of 28640433525551 in words is "twenty-eight trillion, six hundred forty billion, four hundred thirty-three million, five hundred twenty-five thousand, five hundred fifty-one".