28125009461 has 2 divisors, whose sum is σ = 28125009462. Its totient is φ = 28125009460.

The previous prime is 28125009443. The next prime is 28125009509. The reversal of 28125009461 is 16490052182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28124967025 + 42436 = 167705^2 + 206^2 .

It is a cyclic number.

It is not a de Polignac number, because 28125009461 - 2¹⁴ = 28124993077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28125029461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14062504730 + 14062504731.

It is an arithmetic number, because the mean of its divisors is an integer number (14062504731).

Almost surely, 2^28125009461 is an apocalyptic number.

It is an amenable number.

28125009461 is a deficient number, since it is larger than the sum of its proper divisors (1).

28125009461 is an equidigital number, since it uses as much as digits as its factorization.

28125009461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 28125009461 in words is "twenty-eight billion, one hundred twenty-five million, nine thousand, four hundred sixty-one".