1011263555 has 16 divisors (see below), whose sum is σ = 1263769344. Its totient is φ = 775971840.

The previous prime is 1011263549. The next prime is 1011263593. The reversal of 1011263555 is 5553621101.

It is not a de Polignac number, because 1011263555 - 2¹⁰ = 1011262531 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11354 + ... + 46383.

It is an arithmetic number, because the mean of its divisors is an integer number (78985584).

Almost surely, 2^1011263555 is an apocalyptic number.

1011263555 is a deficient number, since it is larger than the sum of its proper divisors (252505789).

1011263555 is a wasteful number, since it uses less digits than its factorization.

1011263555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57886.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1011263555 is about 31800.3703594785. The cubic root of 1011263555 is about 1003.7405094772.

Adding to 1011263555 its reverse (5553621101), we get a palindrome (6564884656).

The spelling of 1011263555 in words is "one billion, eleven million, two hundred sixty-three thousand, five hundred fifty-five".