25120167601 has 4 divisors (see below), whose sum is σ = 25120777572. Its totient is φ = 25119557632.

The previous prime is 25120167593. The next prime is 25120167607. The reversal of 25120167601 is 10676102152.

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 14428814400 + 10691353201 = 120120^2 + 103399^2 .

It is a cyclic number.

It is not a de Polignac number, because 25120167601 - 2³ = 25120167593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25120167607) 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, 238360 + ... + 327193.

It is an arithmetic number, because the mean of its divisors is an integer number (6280194393).

Almost surely, 2^25120167601 is an apocalyptic number.

It is an amenable number.

25120167601 is a deficient number, since it is larger than the sum of its proper divisors (609971).

25120167601 is an equidigital number, since it uses as much as digits as its factorization.

25120167601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609970.

The product of its (nonzero) digits is 5040, while the sum is 31.

Adding to 25120167601 its reverse (10676102152), we get a palindrome (35796269753).

It can be divided in two parts, 25120 and 167601, that added together give a square (192721 = 439²).

The spelling of 25120167601 in words is "twenty-five billion, one hundred twenty million, one hundred sixty-seven thousand, six hundred one".