25215552052445 has 16 divisors (see below), whose sum is σ = 30829810343472. Its totient is φ = 19791682060800.

The previous prime is 25215552052441. The next prime is 25215552052543. The reversal of 25215552052445 is 54425025551252.

It can be written as a sum of positive squares in 8 ways, for example, as 9369635292196 + 15845916760249 = 3060986^2 + 3980693^2 .

It is not a de Polignac number, because 25215552052445 - 2² = 25215552052441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25215552052445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25215552052441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47382659 + ... + 47911871.

It is an arithmetic number, because the mean of its divisors is an integer number (1926863146467).

Almost surely, 2^{25215552052445} is an apocalyptic number.

It is an amenable number.

25215552052445 is a deficient number, since it is larger than the sum of its proper divisors (5614258291027).

25215552052445 is a wasteful number, since it uses less digits than its factorization.

25215552052445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709072.

The product of its (nonzero) digits is 4000000, while the sum is 47.

The spelling of 25215552052445 in words is "twenty-five trillion, two hundred fifteen billion, five hundred fifty-two million, fifty-two thousand, four hundred forty-five".