2155520540411 has 16 divisors (see below), whose sum is σ = 2530295901120. Its totient is φ = 1797466567680.

The previous prime is 2155520540399. The next prime is 2155520540417. The reversal of 2155520540411 is 1140450255512.

It is not a de Polignac number, because 2155520540411 - 2¹⁸ = 2155520278267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155520540417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2079971 + ... + 2938931.

It is an arithmetic number, because the mean of its divisors is an integer number (158143493820).

Almost surely, 2^{2155520540411} is an apocalyptic number.

2155520540411 is a deficient number, since it is larger than the sum of its proper divisors (374775360709).

2155520540411 is an equidigital number, since it uses as much as digits as its factorization.

2155520540411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868694.

The product of its (nonzero) digits is 40000, while the sum is 35.

Adding to 2155520540411 its reverse (1140450255512), we get a palindrome (3295970795923).

The spelling of 2155520540411 in words is "two trillion, one hundred fifty-five billion, five hundred twenty million, five hundred forty thousand, four hundred eleven".