25536562044 has 24 divisors (see below), whose sum is σ = 68097499008. Its totient is φ = 7296160560.

The previous prime is 25536562043. The next prime is 25536562063. The reversal of 25536562044 is 44026563552.

It is a super-2 number, since 2×25536562044² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 25536561987 and 25536562005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25536562043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152003262 + ... + 152003429.

It is an arithmetic number, because the mean of its divisors is an integer number (2837395792).

Almost surely, 2^25536562044 is an apocalyptic number.

It is an amenable number.

25536562044 is an abundant number, since it is smaller than the sum of its proper divisors (42560936964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25536562044 is a wasteful number, since it uses less digits than its factorization.

25536562044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304006705 (or 304006703 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 42.

The spelling of 25536562044 in words is "twenty-five billion, five hundred thirty-six million, five hundred sixty-two thousand, forty-four".