25545355615623 has 16 divisors (see below), whose sum is σ = 34222422911616. Its totient is φ = 16949265174240.

The previous prime is 25545355615621. The next prime is 25545355615631. The reversal of 25545355615623 is 32651655354552.

It is not a de Polignac number, because 25545355615623 - 2¹ = 25545355615621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25545355615621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46628536 + ... + 47173202.

It is an arithmetic number, because the mean of its divisors is an integer number (2138901431976).

Almost surely, 2^{25545355615623} is an apocalyptic number.

25545355615623 is a deficient number, since it is larger than the sum of its proper divisors (8677067295993).

25545355615623 is a wasteful number, since it uses less digits than its factorization.

25545355615623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618974.

The product of its digits is 81000000, while the sum is 57.

The spelling of 25545355615623 in words is "twenty-five trillion, five hundred forty-five billion, three hundred fifty-five million, six hundred fifteen thousand, six hundred twenty-three".