28130981537 has 2 divisors, whose sum is σ = 28130981538. Its totient is φ = 28130981536.

The previous prime is 28130981521. The next prime is 28130981579. The reversal of 28130981537 is 73518903182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26288082496 + 1842899041 = 162136^2 + 42929^2 .

It is a cyclic number.

It is not a de Polignac number, because 28130981537 - 2⁴ = 28130981521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28130981491 and 28130981500.

It is not a weakly prime, because it can be changed into another prime (28130981597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14065490768 + 14065490769.

It is an arithmetic number, because the mean of its divisors is an integer number (14065490769).

Almost surely, 2^28130981537 is an apocalyptic number.

It is an amenable number.

28130981537 is a deficient number, since it is larger than the sum of its proper divisors (1).

28130981537 is an equidigital number, since it uses as much as digits as its factorization.

28130981537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 28130981537 in words is "twenty-eight billion, one hundred thirty million, nine hundred eighty-one thousand, five hundred thirty-seven".