25891011 has 12 divisors (see below), whose sum is σ = 37957192. Its totient is φ = 17002656.

The previous prime is 25891003. The next prime is 25891013. The reversal of 25891011 is 11019852.

It is not a de Polignac number, because 25891011 - 2³ = 25891003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25891013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20866 + ... + 22071.

Almost surely, 2^25891011 is an apocalyptic number.

25891011 is a deficient number, since it is larger than the sum of its proper divisors (12066181).

25891011 is a wasteful number, since it uses less digits than its factorization.

25891011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43010 (or 43007 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 25891011 is about 5088.3210393999. The cubic root of 25891011 is about 295.8350790260.

It can be divided in two parts, 2589 and 1011, that added together give a square (3600 = 60²).

The spelling of 25891011 in words is "twenty-five million, eight hundred ninety-one thousand, eleven".