2011554131555 has 12 divisors (see below), whose sum is σ = 2523378683280. Its totient is φ = 1539276202992.

The previous prime is 2011554131497. The next prime is 2011554131599. The reversal of 2011554131555 is 5551314551102.

It is a de Polignac number, because none of the positive numbers 2^k-2011554131555 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 380253335 + ... + 380258624.

It is an arithmetic number, because the mean of its divisors is an integer number (210281556940).

Almost surely, 2^{2011554131555} is an apocalyptic number.

2011554131555 is a deficient number, since it is larger than the sum of its proper divisors (511824551725).

2011554131555 is an equidigital number, since it uses as much as digits as its factorization.

2011554131555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760512010 (or 760511987 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 38.

Adding to 2011554131555 its reverse (5551314551102), we get a palindrome (7562868682657).

The spelling of 2011554131555 in words is "two trillion, eleven billion, five hundred fifty-four million, one hundred thirty-one thousand, five hundred fifty-five".