25511250401 has 32 divisors (see below), whose sum is σ = 31701922560. Its totient is φ = 19990607616.

The previous prime is 25511250389. The next prime is 25511250409. The reversal of 25511250401 is 10405211552.

It is not a de Polignac number, because 25511250401 - 2¹⁰ = 25511249377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25511250409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4066295 + ... + 4072563.

It is an arithmetic number, because the mean of its divisors is an integer number (990685080).

Almost surely, 2^25511250401 is an apocalyptic number.

It is an amenable number.

25511250401 is a deficient number, since it is larger than the sum of its proper divisors (6190672159).

25511250401 is a wasteful number, since it uses less digits than its factorization.

25511250401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6713.

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 25511250401 its reverse (10405211552), we get a palindrome (35916461953).

The spelling of 25511250401 in words is "twenty-five billion, five hundred eleven million, two hundred fifty thousand, four hundred one".