25553213500420 has 24 divisors (see below), whose sum is σ = 54154057973400. Its totient is φ = 10127512138752.

The previous prime is 25553213500403. The next prime is 25553213500553. The reversal of 25553213500420 is 2400531235552.

It can be written as a sum of positive squares in 4 ways, for example, as 10367524178496 + 15185689321924 = 3219864^2 + 3896882^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25553213500420.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5860826605 + ... + 5860830964.

It is an arithmetic number, because the mean of its divisors is an integer number (2256419082225).

Almost surely, 2^{25553213500420} is an apocalyptic number.

25553213500420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25553213500420 is an abundant number, since it is smaller than the sum of its proper divisors (28600844472980).

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

25553213500420 is a wasteful number, since it uses less digits than its factorization.

25553213500420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11721657687 (or 11721657685 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 37.

Adding to 25553213500420 its reverse (2400531235552), we get a palindrome (27953744735972).

The spelling of 25553213500420 in words is "twenty-five trillion, five hundred fifty-three billion, two hundred thirteen million, five hundred thousand, four hundred twenty".