28356057313 has 2 divisors, whose sum is σ = 28356057314. Its totient is φ = 28356057312.

The previous prime is 28356057287. The next prime is 28356057329. The reversal of 28356057313 is 31375065382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21204310689 + 7151746624 = 145617^2 + 84568^2 .

It is a cyclic number.

It is not a de Polignac number, because 28356057313 - 2²¹ = 28353960161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28356057313.

It is not a weakly prime, because it can be changed into another prime (28356057383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14178028656 + 14178028657.

It is an arithmetic number, because the mean of its divisors is an integer number (14178028657).

Almost surely, 2^28356057313 is an apocalyptic number.

It is an amenable number.

28356057313 is a deficient number, since it is larger than the sum of its proper divisors (1).

28356057313 is an equidigital number, since it uses as much as digits as its factorization.

28356057313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 28356057313 in words is "twenty-eight billion, three hundred fifty-six million, fifty-seven thousand, three hundred thirteen".