25506660045001 has 4 divisors (see below), whose sum is σ = 27007051812372. Its totient is φ = 24006268277632.

The previous prime is 25506660044939. The next prime is 25506660045043. The reversal of 25506660045001 is 10054006660552.

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 21452783841225 + 4053876203776 = 4631715^2 + 2013424^2 .

It is not a de Polignac number, because 25506660045001 - 2¹¹ = 25506660042953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25506660045071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750195883660 + ... + 750195883693.

It is an arithmetic number, because the mean of its divisors is an integer number (6751762953093).

Almost surely, 2^{25506660045001} is an apocalyptic number.

It is an amenable number.

25506660045001 is a deficient number, since it is larger than the sum of its proper divisors (1500391767371).

25506660045001 is a wasteful number, since it uses less digits than its factorization.

25506660045001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500391767370.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 25506660045001 in words is "twenty-five trillion, five hundred six billion, six hundred sixty million, forty-five thousand, one".