13642546405261 has 4 divisors (see below), whose sum is σ = 13643254282492. Its totient is φ = 13641838528032.

The previous prime is 13642546405253. The next prime is 13642546405337. The reversal of 13642546405261 is 16250464524631.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11820572867236 + 1821973538025 = 3438106^2 + 1349805^2 .

It is a cyclic number.

It is not a de Polignac number, because 13642546405261 - 2³ = 13642546405253 is a prime.

It is a super-2 number, since 2×13642546405261² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13642546400261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353909706 + ... + 353948251.

It is an arithmetic number, because the mean of its divisors is an integer number (3410813570623).

Almost surely, 2^{13642546405261} is an apocalyptic number.

It is an amenable number.

13642546405261 is a deficient number, since it is larger than the sum of its proper divisors (707877231).

13642546405261 is an equidigital number, since it uses as much as digits as its factorization.

13642546405261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707877230.

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 13642546405261 in words is "thirteen trillion, six hundred forty-two billion, five hundred forty-six million, four hundred five thousand, two hundred sixty-one".