1011165903 has 48 divisors (see below), whose sum is σ = 1686972000. Its totient is φ = 597801600.

The previous prime is 1011165877. The next prime is 1011165907. The reversal of 1011165903 is 3095611101.

1011165903 is a `hidden beast` number, since 1 + 0 + 1 + 1 + 1 + 659 + 0 + 3 = 666.

It is not a de Polignac number, because 1011165903 - 2⁶ = 1011165839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011165907) 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, 130173 + ... + 137721.

It is an arithmetic number, because the mean of its divisors is an integer number (35145250).

Almost surely, 2^1011165903 is an apocalyptic number.

1011165903 is a deficient number, since it is larger than the sum of its proper divisors (675806097).

1011165903 is a wasteful number, since it uses less digits than its factorization.

1011165903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7621 (or 7604 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 1011165903 is about 31798.8349314877. The cubic root of 1011165903 is about 1003.7081999232.

The spelling of 1011165903 in words is "one billion, eleven million, one hundred sixty-five thousand, nine hundred three".