25610612121011 has 4 divisors (see below), whose sum is σ = 25610873527800. Its totient is φ = 25610350714224.

The previous prime is 25610612120987. The next prime is 25610612121023. The reversal of 25610612121011 is 11012121601652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25610612121011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25610612121091) 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, 130556381 + ... + 130752398.

It is an arithmetic number, because the mean of its divisors is an integer number (6402718381950).

Almost surely, 2^{25610612121011} is an apocalyptic number.

25610612121011 is a deficient number, since it is larger than the sum of its proper divisors (261406789).

25610612121011 is an equidigital number, since it uses as much as digits as its factorization.

25610612121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261406788.

The product of its (nonzero) digits is 1440, while the sum is 29.

Adding to 25610612121011 its reverse (11012121601652), we get a palindrome (36622733722663).

The spelling of 25610612121011 in words is "twenty-five trillion, six hundred ten billion, six hundred twelve million, one hundred twenty-one thousand, eleven".