25556026310430 has 128 divisors (see below), whose sum is σ = 76483512493056. Its totient is φ = 5309331225600.

The previous prime is 25556026310359. The next prime is 25556026310431. The reversal of 25556026310430 is 3401362065552.

It is a happy number.

It is a super-2 number, since 2×25556026310430² (a number of 28 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25556026310431) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11101474 + ... + 13204346.

It is an arithmetic number, because the mean of its divisors is an integer number (597527441352).

Almost surely, 2^{25556026310430} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25556026310430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38241756246528).

25556026310430 is an abundant number, since it is smaller than the sum of its proper divisors (50927486182626).

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

25556026310430 is a wasteful number, since it uses less digits than its factorization.

25556026310430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108162.

The product of its (nonzero) digits is 648000, while the sum is 42.

Adding to 25556026310430 its reverse (3401362065552), we get a palindrome (28957388375982).

The spelling of 25556026310430 in words is "twenty-five trillion, five hundred fifty-six billion, twenty-six million, three hundred ten thousand, four hundred thirty".