28761761573 has 2 divisors, whose sum is σ = 28761761574. Its totient is φ = 28761761572.

The previous prime is 28761761521. The next prime is 28761761603. The reversal of 28761761573 is 37516716782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19752334849 + 9009426724 = 140543^2 + 94918^2 .

It is a cyclic number.

It is not a de Polignac number, because 28761761573 - 2¹⁶ = 28761696037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28761761173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14380880786 + 14380880787.

It is an arithmetic number, because the mean of its divisors is an integer number (14380880787).

Almost surely, 2^28761761573 is an apocalyptic number.

It is an amenable number.

28761761573 is a deficient number, since it is larger than the sum of its proper divisors (1).

28761761573 is an equidigital number, since it uses as much as digits as its factorization.

28761761573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 53.

The spelling of 28761761573 in words is "twenty-eight billion, seven hundred sixty-one million, seven hundred sixty-one thousand, five hundred seventy-three".