1011685540 has 12 divisors (see below), whose sum is σ = 2124539676. Its totient is φ = 404674208.

The previous prime is 1011685531. The next prime is 1011685573. The reversal of 1011685540 is 455861101.

It can be written as a sum of positive squares in 2 ways, for example, as 793886976 + 217798564 = 28176^2 + 14758^2 .

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 3 ways as a sum of consecutive naturals, for example, 25292119 + ... + 25292158.

It is an arithmetic number, because the mean of its divisors is an integer number (177044973).

Almost surely, 2^1011685540 is an apocalyptic number.

1011685540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011685540 is an abundant number, since it is smaller than the sum of its proper divisors (1112854136).

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

1011685540 is a wasteful number, since it uses less digits than its factorization.

1011685540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50584286 (or 50584284 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 1011685540 is about 31807.0045744644. The cubic root of 1011685540 is about 1003.8801053108.

The spelling of 1011685540 in words is "one billion, eleven million, six hundred eighty-five thousand, five hundred forty".