1011005055 has 48 divisors (see below), whose sum is σ = 1772715360. Its totient is φ = 532998144.

The previous prime is 1011005053. The next prime is 1011005087. The reversal of 1011005055 is 5505001101.

It is not a de Polignac number, because 1011005055 - 2¹ = 1011005053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011005053) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2471691 + ... + 2472099.

It is an arithmetic number, because the mean of its divisors is an integer number (36931570).

Almost surely, 2^1011005055 is an apocalyptic number.

1011005055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1011005055 is a deficient number, since it is larger than the sum of its proper divisors (761710305).

1011005055 is a wasteful number, since it uses less digits than its factorization.

1011005055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 18.

The square root of 1011005055 is about 31796.3056816354. The cubic root of 1011005055 is about 1003.6549765377.

Adding to 1011005055 its reverse (5505001101), we get a palindrome (6516006156).

The spelling of 1011005055 in words is "one billion, eleven million, five thousand, fifty-five".