3261156055013 has 4 divisors (see below), whose sum is σ = 3322687301388. Its totient is φ = 3199624808640.

The previous prime is 3261156054991. The next prime is 3261156055037. The reversal of 3261156055013 is 3105506511623.

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 2460778903969 + 800377151044 = 1568687^2 + 894638^2 .

It is a cyclic number.

It is not a de Polignac number, because 3261156055013 - 2⁸ = 3261156054757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3261156055063) 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, 30765623108 + ... + 30765623213.

It is an arithmetic number, because the mean of its divisors is an integer number (830671825347).

Almost surely, 2^{3261156055013} is an apocalyptic number.

It is an amenable number.

3261156055013 is a deficient number, since it is larger than the sum of its proper divisors (61531246375).

3261156055013 is an equidigital number, since it uses as much as digits as its factorization.

3261156055013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61531246374.

The product of its (nonzero) digits is 81000, while the sum is 38.

The spelling of 3261156055013 in words is "three trillion, two hundred sixty-one billion, one hundred fifty-six million, fifty-five thousand, thirteen".