28553204502157 has 2 divisors, whose sum is σ = 28553204502158. Its totient is φ = 28553204502156.

The previous prime is 28553204502131. The next prime is 28553204502209. The reversal of 28553204502157 is 75120540235582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23132963986276 + 5420240515881 = 4809674^2 + 2328141^2 .

It is a cyclic number.

It is not a de Polignac number, because 28553204502157 - 2²³ = 28553196113549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28553204502157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28553204502457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14276602251078 + 14276602251079.

It is an arithmetic number, because the mean of its divisors is an integer number (14276602251079).

Almost surely, 2^{28553204502157} is an apocalyptic number.

It is an amenable number.

28553204502157 is a deficient number, since it is larger than the sum of its proper divisors (1).

28553204502157 is an equidigital number, since it uses as much as digits as its factorization.

28553204502157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360000, while the sum is 49.

The spelling of 28553204502157 in words is "twenty-eight trillion, five hundred fifty-three billion, two hundred four million, five hundred two thousand, one hundred fifty-seven".