21770524212725 has 6 divisors (see below), whose sum is σ = 26995450023810. Its totient is φ = 17416419370160.

The previous prime is 21770524212709. The next prime is 21770524212739. The reversal of 21770524212725 is 52721242507712.

It can be written as a sum of positive squares in 3 ways, for example, as 5185088772241 + 16585435440484 = 2277079^2 + 4072522^2 .

It is not a de Polignac number, because 21770524212725 - 2⁴ = 21770524212709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21770524212725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 435410484230 + ... + 435410484279.

It is an arithmetic number, because the mean of its divisors is an integer number (4499241670635).

Almost surely, 2^{21770524212725} is an apocalyptic number.

21770524212725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21770524212725 is a deficient number, since it is larger than the sum of its proper divisors (5224925811085).

21770524212725 is an equidigital number, since it uses as much as digits as its factorization.

21770524212725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870820968519 (or 870820968514 counting only the distinct ones).

The product of its (nonzero) digits is 1097600, while the sum is 47.

The spelling of 21770524212725 in words is "twenty-one trillion, seven hundred seventy billion, five hundred twenty-four million, two hundred twelve thousand, seven hundred twenty-five".