25521654542441 has 16 divisors (see below), whose sum is σ = 26429451700224. Its totient is φ = 24625504479744.

The previous prime is 25521654542411. The next prime is 25521654542471. The reversal of 25521654542441 is 14424545612552.

It is an interprime number because it is at equal distance from previous prime (25521654542411) and next prime (25521654542471).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25521654542441 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 25521654542441.

It is not an unprimeable number, because it can be changed into a prime (25521654542411) 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, 9486086 + ... + 11875568.

It is an arithmetic number, because the mean of its divisors is an integer number (1651840731264).

Almost surely, 2^{25521654542441} is an apocalyptic number.

It is an amenable number.

25521654542441 is a deficient number, since it is larger than the sum of its proper divisors (907797157783).

25521654542441 is a wasteful number, since it uses less digits than its factorization.

25521654542441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391920.

The product of its digits is 7680000, while the sum is 50.

The spelling of 25521654542441 in words is "twenty-five trillion, five hundred twenty-one billion, six hundred fifty-four million, five hundred forty-two thousand, four hundred forty-one".