25520353424 has 40 divisors (see below), whose sum is σ = 52428087840. Its totient is φ = 12000331008.

The previous prime is 25520353393. The next prime is 25520353427. The reversal of 25520353424 is 42435302552.

It is a super-3 number, since 3×25520353424³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (25520353427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264734 + ... + 348029.

It is an arithmetic number, because the mean of its divisors is an integer number (1310702196).

Almost surely, 2^25520353424 is an apocalyptic number.

It is an amenable number.

25520353424 is an abundant number, since it is smaller than the sum of its proper divisors (26907734416).

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

25520353424 is a wasteful number, since it uses less digits than its factorization.

25520353424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612927 (or 612921 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 35.

Adding to 25520353424 its reverse (42435302552), we get a palindrome (67955655976).

The spelling of 25520353424 in words is "twenty-five billion, five hundred twenty million, three hundred fifty-three thousand, four hundred twenty-four".