25220166236245 has 8 divisors (see below), whose sum is σ = 30264959728440. Its totient is φ = 20175626159040.

The previous prime is 25220166236233. The next prime is 25220166236269. The reversal of 25220166236245 is 54263266102252.

It can be written as a sum of positive squares in 4 ways, for example, as 3797357639761 + 21422808596484 = 1948681^2 + 4628478^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25220166236245 - 2⁴³ = 16424073214037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25220166236195 and 25220166236204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63134730 + ... + 63532939.

It is an arithmetic number, because the mean of its divisors is an integer number (3783119966055).

Almost surely, 2^{25220166236245} is an apocalyptic number.

It is an amenable number.

25220166236245 is a deficient number, since it is larger than the sum of its proper divisors (5044793492195).

25220166236245 is a wasteful number, since it uses less digits than its factorization.

25220166236245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126707495.

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 25220166236245 in words is "twenty-five trillion, two hundred twenty billion, one hundred sixty-six million, two hundred thirty-six thousand, two hundred forty-five".