405540312011 has 4 divisors (see below), whose sum is σ = 405553788024. Its totient is φ = 405526836000.

The previous prime is 405540311987. The next prime is 405540312013. The reversal of 405540312011 is 110213045504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 405540312011 - 2¹⁴ = 405540295627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405540312013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6692765 + ... + 6753086.

It is an arithmetic number, because the mean of its divisors is an integer number (101388447006).

Almost surely, 2^405540312011 is an apocalyptic number.

405540312011 is a deficient number, since it is larger than the sum of its proper divisors (13476013).

405540312011 is a wasteful number, since it uses less digits than its factorization.

405540312011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13476012.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 405540312011 its reverse (110213045504), we get a palindrome (515753357515).

The spelling of 405540312011 in words is "four hundred five billion, five hundred forty million, three hundred twelve thousand, eleven".