28260971077 has 2 divisors, whose sum is σ = 28260971078. Its totient is φ = 28260971076.

The previous prime is 28260971029. The next prime is 28260971107. The reversal of 28260971077 is 77017906282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25800711876 + 2460259201 = 160626^2 + 49601^2 .

It is a cyclic number.

It is not a de Polignac number, because 28260971077 - 2⁷ = 28260970949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28260971077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28260971017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14130485538 + 14130485539.

It is an arithmetic number, because the mean of its divisors is an integer number (14130485539).

Almost surely, 2^28260971077 is an apocalyptic number.

It is an amenable number.

28260971077 is a deficient number, since it is larger than the sum of its proper divisors (1).

28260971077 is an equidigital number, since it uses as much as digits as its factorization.

28260971077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 49.

The spelling of 28260971077 in words is "twenty-eight billion, two hundred sixty million, nine hundred seventy-one thousand, seventy-seven".