1011865011 has 16 divisors (see below), whose sum is σ = 1408341408. Its totient is φ = 645580800.

The previous prime is 1011865003. The next prime is 1011865033. The reversal of 1011865011 is 1105681101.

It is a happy number.

It is not a de Polignac number, because 1011865011 - 2³ = 1011865003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1011860011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67950 + ... + 81491.

It is an arithmetic number, because the mean of its divisors is an integer number (88021338).

Almost surely, 2^1011865011 is an apocalyptic number.

1011865011 is a deficient number, since it is larger than the sum of its proper divisors (396476397).

1011865011 is a wasteful number, since it uses less digits than its factorization.

1011865011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149542.

The product of its (nonzero) digits is 240, while the sum is 24.

The square root of 1011865011 is about 31809.8256989880. The cubic root of 1011865011 is about 1003.9394639114.

The spelling of 1011865011 in words is "one billion, eleven million, eight hundred sixty-five thousand, eleven".