25542115201 has 4 divisors (see below), whose sum is σ = 25555842004. Its totient is φ = 25528388400.

The previous prime is 25542115187. The next prime is 25542115289. The reversal of 25542115201 is 10251124552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2824391025 + 22717724176 = 53145^2 + 150724^2 .

It is a cyclic number.

It is not a de Polignac number, because 25542115201 - 2³¹ = 23394631553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25542115201.

It is not an unprimeable number, because it can be changed into a prime (25542112201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6860610 + ... + 6864331.

It is an arithmetic number, because the mean of its divisors is an integer number (6388960501).

Almost surely, 2^25542115201 is an apocalyptic number.

It is an amenable number.

25542115201 is a deficient number, since it is larger than the sum of its proper divisors (13726803).

25542115201 is a wasteful number, since it uses less digits than its factorization.

25542115201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13726802.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 25542115201 its reverse (10251124552), we get a palindrome (35793239753).

The spelling of 25542115201 in words is "twenty-five billion, five hundred forty-two million, one hundred fifteen thousand, two hundred one".