25403578211020 has 192 divisors, whose sum is σ = 57944703801600. Its totient is φ = 9319971225600.

The previous prime is 25403578210987. The next prime is 25403578211027. The reversal of 25403578211020 is 2011287530452.

It is not an unprimeable number, because it can be changed into a prime (25403578211027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 984660081 + ... + 984685879.

It is an arithmetic number, because the mean of its divisors is an integer number (301795332300).

Almost surely, 2^{25403578211020} is an apocalyptic number.

25403578211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25403578211020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28972351900800).

25403578211020 is an abundant number, since it is smaller than the sum of its proper divisors (32541125590580).

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

25403578211020 is a wasteful number, since it uses less digits than its factorization.

25403578211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26324 (or 26322 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 25403578211020 in words is "twenty-five trillion, four hundred three billion, five hundred seventy-eight million, two hundred eleven thousand, twenty".