25550116536 has 128 divisors (see below), whose sum is σ = 76314700800. Its totient is φ = 6969768960.

The previous prime is 25550116483. The next prime is 25550116609. The reversal of 25550116536 is 63561105552.

It is a junction number, because it is equal to n+sod(n) for n = 25550116494 and 25550116503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2192806 + ... + 2204426.

It is an arithmetic number, because the mean of its divisors is an integer number (596208600).

Almost surely, 2^25550116536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25550116536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38157350400).

25550116536 is an abundant number, since it is smaller than the sum of its proper divisors (50764584264).

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

25550116536 is a wasteful number, since it uses less digits than its factorization.

25550116536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12229 (or 12225 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 39.

The spelling of 25550116536 in words is "twenty-five billion, five hundred fifty million, one hundred sixteen thousand, five hundred thirty-six".