25990488211 has 4 divisors (see below), whose sum is σ = 26242823152. Its totient is φ = 25738153272.

The previous prime is 25990488203. The next prime is 25990488247. The reversal of 25990488211 is 11288409952.

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

It is a cyclic number.

It is not a de Polignac number, because 25990488211 - 2³ = 25990488203 is a prime.

It is a super-2 number, since 2×25990488211² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25990485211) 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, 126167316 + ... + 126167521.

It is an arithmetic number, because the mean of its divisors is an integer number (6560705788).

Almost surely, 2^25990488211 is an apocalyptic number.

25990488211 is a deficient number, since it is larger than the sum of its proper divisors (252334941).

25990488211 is a wasteful number, since it uses less digits than its factorization.

25990488211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252334940.

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 25990488211 in words is "twenty-five billion, nine hundred ninety million, four hundred eighty-eight thousand, two hundred eleven".