28753774157 has 2 divisors, whose sum is σ = 28753774158. Its totient is φ = 28753774156.

The previous prime is 28753774123. The next prime is 28753774169. The reversal of 28753774157 is 75147735782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28518427876 + 235346281 = 168874^2 + 15341^2 .

It is a cyclic number.

It is not a de Polignac number, because 28753774157 - 2³² = 24458806861 is a prime.

It is a super-2 number, since 2×28753774157² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28753774957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14376887078 + 14376887079.

It is an arithmetic number, because the mean of its divisors is an integer number (14376887079).

Almost surely, 2^28753774157 is an apocalyptic number.

It is an amenable number.

28753774157 is a deficient number, since it is larger than the sum of its proper divisors (1).

28753774157 is an equidigital number, since it uses as much as digits as its factorization.

28753774157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11524800, while the sum is 56.

The spelling of 28753774157 in words is "twenty-eight billion, seven hundred fifty-three million, seven hundred seventy-four thousand, one hundred fifty-seven".