28783782962705 has 4 divisors (see below), whose sum is σ = 34540539555252. Its totient is φ = 23027026370160.

The previous prime is 28783782962689. The next prime is 28783782962717. The reversal of 28783782962705 is 50726928738782.

It is a Cunningham number, because it is equal to 5365052²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10362167017024 + 18421615945681 = 3219032^2 + 4292041^2 .

It is not a de Polignac number, because 28783782962705 - 2⁴ = 28783782962689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2878378296266 + ... + 2878378296275.

It is an arithmetic number, because the mean of its divisors is an integer number (8635134888813).

Almost surely, 2^{28783782962705} is an apocalyptic number.

It is an amenable number.

28783782962705 is a deficient number, since it is larger than the sum of its proper divisors (5756756592547).

28783782962705 is an equidigital number, since it uses as much as digits as its factorization.

28783782962705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5756756592546.

The product of its (nonzero) digits is 1137991680, while the sum is 74.

The spelling of 28783782962705 in words is "twenty-eight trillion, seven hundred eighty-three billion, seven hundred eighty-two million, nine hundred sixty-two thousand, seven hundred five".