28572458023661 has 2 divisors, whose sum is σ = 28572458023662. Its totient is φ = 28572458023660.

The previous prime is 28572458023609. The next prime is 28572458023783. The reversal of 28572458023661 is 16632085427582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27750443801161 + 822014222500 = 5267869^2 + 906650^2 .

It is a cyclic number.

It is not a de Polignac number, because 28572458023661 - 2¹⁴ = 28572458007277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28572458023661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28572458623661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14286229011830 + 14286229011831.

It is an arithmetic number, because the mean of its divisors is an integer number (14286229011831).

Almost surely, 2^{28572458023661} is an apocalyptic number.

It is an amenable number.

28572458023661 is a deficient number, since it is larger than the sum of its proper divisors (1).

28572458023661 is an equidigital number, since it uses as much as digits as its factorization.

28572458023661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38707200, while the sum is 59.

The spelling of 28572458023661 in words is "twenty-eight trillion, five hundred seventy-two billion, four hundred fifty-eight million, twenty-three thousand, six hundred sixty-one".