28615624813 has 2 divisors, whose sum is σ = 28615624814. Its totient is φ = 28615624812.

The previous prime is 28615624789. The next prime is 28615624819. The reversal of 28615624813 is 31842651682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27477372169 + 1138252644 = 165763^2 + 33738^2 .

It is a cyclic number.

It is not a de Polignac number, because 28615624813 - 2⁵ = 28615624781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28615624819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14307812406 + 14307812407.

It is an arithmetic number, because the mean of its divisors is an integer number (14307812407).

Almost surely, 2^28615624813 is an apocalyptic number.

It is an amenable number.

28615624813 is a deficient number, since it is larger than the sum of its proper divisors (1).

28615624813 is an equidigital number, since it uses as much as digits as its factorization.

28615624813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 46.

The spelling of 28615624813 in words is "twenty-eight billion, six hundred fifteen million, six hundred twenty-four thousand, eight hundred thirteen".