25140005136 has 135 divisors (see below), whose sum is σ = 71730384687. Its totient is φ = 8219543040.

The previous prime is 25140005113. The next prime is 25140005147. The reversal of 25140005136 is 63150004152.

The square root of 25140005136 is 158556.

It is a perfect power (a square), and thus also a powerful number.

25140005136 is a `hidden beast` number, since 2 + 5 + 140 + 0 + 0 + 513 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8306499600 + 16833505536 = 91140^2 + 129744^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 138894966 + ... + 138895146.

Almost surely, 2^25140005136 is an apocalyptic number.

25140005136 is the 158556-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25140005136

25140005136 is an abundant number, since it is smaller than the sum of its proper divisors (46590379551).

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

25140005136 is an equidigital number, since it uses as much as digits as its factorization.

25140005136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Multiplying 25140005136 by its product of nonzero digits (3600), we get a square (90504018489600 = 9513360²).

Adding to 25140005136 its reverse (63150004152), we get a palindrome (88290009288).

The spelling of 25140005136 in words is "twenty-five billion, one hundred forty million, five thousand, one hundred thirty-six".