1011366405 has 120 divisors (see below), whose sum is σ = 2128422912. Its totient is φ = 450043776.

The previous prime is 1011366403. The next prime is 1011366437. The reversal of 1011366405 is 5046631101.

1011366405 is a `hidden beast` number, since 1 + 0 + 1 + 13 + 6 + 640 + 5 = 666.

1011366405 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1011366405 - 2¹ = 1011366403 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 (1011366403) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 7963452 + ... + 7963578.

Almost surely, 2^1011366405 is an apocalyptic number.

1011366405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1011366405 is an abundant number, since it is smaller than the sum of its proper divisors (1117056507).

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

1011366405 is an equidigital number, since it uses as much as digits as its factorization.

1011366405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1011366405 is about 31801.9874378945. The cubic root of 1011366405 is about 1003.7745366146.

Adding to 1011366405 its reverse (5046631101), we get a palindrome (6057997506).

The spelling of 1011366405 in words is "one billion, eleven million, three hundred sixty-six thousand, four hundred five".