28489172342401 has 2 divisors, whose sum is σ = 28489172342402. Its totient is φ = 28489172342400.

The previous prime is 28489172342347. The next prime is 28489172342419. The reversal of 28489172342401 is 10424327198482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25982222620176 + 2506949722225 = 5097276^2 + 1583335^2 .

It is a cyclic number.

It is not a de Polignac number, because 28489172342401 - 2¹⁷ = 28489172211329 is a prime.

It is not a weakly prime, because it can be changed into another prime (28489172342441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14244586171200 + 14244586171201.

It is an arithmetic number, because the mean of its divisors is an integer number (14244586171201).

Almost surely, 2^{28489172342401} is an apocalyptic number.

It is an amenable number.

28489172342401 is a deficient number, since it is larger than the sum of its proper divisors (1).

28489172342401 is an equidigital number, since it uses as much as digits as its factorization.

28489172342401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6193152, while the sum is 55.

The spelling of 28489172342401 in words is "twenty-eight trillion, four hundred eighty-nine billion, one hundred seventy-two million, three hundred forty-two thousand, four hundred one".