25206251011 has 16 divisors (see below), whose sum is σ = 26924617728. Its totient is φ = 23542156000.

The previous prime is 25206251009. The next prime is 25206251027. The reversal of 25206251011 is 11015260252.

It is not a de Polignac number, because 25206251011 - 2¹ = 25206251009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25206251111) 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 15 ways as a sum of consecutive naturals, for example, 438861 + ... + 492961.

It is an arithmetic number, because the mean of its divisors is an integer number (1682788608).

Almost surely, 2^25206251011 is an apocalyptic number.

25206251011 is a deficient number, since it is larger than the sum of its proper divisors (1718366717).

25206251011 is a wasteful number, since it uses less digits than its factorization.

25206251011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54602.

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 25206251011 in words is "twenty-five billion, two hundred six million, two hundred fifty-one thousand, eleven".