400011215064 has 16 divisors (see below), whose sum is σ = 1000028037720. Its totient is φ = 133337071680.

The previous prime is 400011215063. The next prime is 400011215111. The reversal of 400011215064 is 460512110004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 16667133961 = 400011215064 / (4 + 0 + 0 + 0 + 1 + 1 + 2 + 1 + 5 + 0 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400011215063) 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, 8333566957 + ... + 8333567004.

Almost surely, 2^400011215064 is an apocalyptic number.

It is an amenable number.

400011215064 is an abundant number, since it is smaller than the sum of its proper divisors (600016822656).

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

400011215064 is a wasteful number, since it uses less digits than its factorization.

400011215064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16667133970 (or 16667133966 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 400011215064 its reverse (460512110004), we get a palindrome (860523325068).

The spelling of 400011215064 in words is "four hundred billion, eleven million, two hundred fifteen thousand, sixty-four".