25516382838 has 32 divisors (see below), whose sum is σ = 52187707392. Its totient is φ = 8314682400.

The previous prime is 25516382831. The next prime is 25516382839. The reversal of 25516382838 is 83828361552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25516382831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154198 + ... + 273513.

It is an arithmetic number, because the mean of its divisors is an integer number (1630865856).

Almost surely, 2^25516382838 is an apocalyptic number.

25516382838 is an abundant number, since it is smaller than the sum of its proper divisors (26671324554).

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

25516382838 is a wasteful number, since it uses less digits than its factorization.

25516382838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427940.

The product of its digits is 2764800, while the sum is 51.

The spelling of 25516382838 in words is "twenty-five billion, five hundred sixteen million, three hundred eighty-two thousand, eight hundred thirty-eight".