1011155040 has 144 divisors (see below), whose sum is σ = 3943543968. Its totient is φ = 231118848.

The previous prime is 1011155011. The next prime is 1011155059. The reversal of 1011155040 is 405511101.

It is a happy number.

1011155040 is a `hidden beast` number, since 1 + 0 + 111 + 550 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40077 + ... + 60236.

It is an arithmetic number, because the mean of its divisors is an integer number (27385722).

Almost surely, 2^1011155040 is an apocalyptic number.

1011155040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011155040 is an abundant number, since it is smaller than the sum of its proper divisors (2932388928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1011155040 is a wasteful number, since it uses less digits than its factorization.

1011155040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100341 (or 100330 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 1011155040 is about 31798.6641228842. The cubic root of 1011155040 is about 1003.7046056164.

Adding to 1011155040 its reverse (405511101), we get a palindrome (1416666141).

The spelling of 1011155040 in words is "one billion, eleven million, one hundred fifty-five thousand, forty".