25623263140 has 12 divisors (see below), whose sum is σ = 53808852636. Its totient is φ = 10249305248.

The previous prime is 25623263131. The next prime is 25623263161. The reversal of 25623263140 is 4136232652.

It can be written as a sum of positive squares in 2 ways, for example, as 11324365056 + 14298898084 = 106416^2 + 119578^2 .

It is a super-2 number, since 2×25623263140² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25623263096 and 25623263105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640581559 + ... + 640581598.

It is an arithmetic number, because the mean of its divisors is an integer number (4484071053).

Almost surely, 2^25623263140 is an apocalyptic number.

25623263140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25623263140 is an abundant number, since it is smaller than the sum of its proper divisors (28185589496).

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

25623263140 is a wasteful number, since it uses less digits than its factorization.

25623263140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281163166 (or 1281163164 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 25623263140 its reverse (4136232652), we get a palindrome (29759495792).

The spelling of 25623263140 in words is "twenty-five billion, six hundred twenty-three million, two hundred sixty-three thousand, one hundred forty".