25134988642 has 8 divisors (see below), whose sum is σ = 37737755100. Its totient is φ = 12555736944.

The previous prime is 25134988601. The next prime is 25134988643. The reversal of 25134988642 is 24688943152.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22740941601 + 2394047041 = 150801^2 + 48929^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 25134988642.

It is not an unprimeable number, because it can be changed into a prime (25134988643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5876017 + ... + 5880292.

Almost surely, 2^25134988642 is an apocalyptic number.

25134988642 is a deficient number, since it is larger than the sum of its proper divisors (12602766458).

25134988642 is a wasteful number, since it uses less digits than its factorization.

25134988642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11757380.

The product of its digits is 3317760, while the sum is 52.

The spelling of 25134988642 in words is "twenty-five billion, one hundred thirty-four million, nine hundred eighty-eight thousand, six hundred forty-two".