11155532042555 has 16 divisors (see below), whose sum is σ = 14346197734464. Its totient is φ = 8305693418880.

The previous prime is 11155532042537. The next prime is 11155532042597. The reversal of 11155532042555 is 55524023555111.

It is not a de Polignac number, because 11155532042555 - 2¹² = 11155532038459 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1310869076 + ... + 1310877585.

It is an arithmetic number, because the mean of its divisors is an integer number (896637358404).

Almost surely, 2^{11155532042555} is an apocalyptic number.

11155532042555 is a deficient number, since it is larger than the sum of its proper divisors (3190665691909).

11155532042555 is a wasteful number, since it uses less digits than its factorization.

11155532042555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2621746726.

The product of its (nonzero) digits is 750000, while the sum is 44.

Adding to 11155532042555 its reverse (55524023555111), we get a palindrome (66679555597666).

The spelling of 11155532042555 in words is "eleven trillion, one hundred fifty-five billion, five hundred thirty-two million, forty-two thousand, five hundred fifty-five".