400011215650 has 24 divisors (see below), whose sum is σ = 744058447524. Its totient is φ = 159996403200.

The previous prime is 400011215629. The next prime is 400011215651. The reversal of 400011215650 is 56512110004.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 27057947049 + 372953268601 = 164493^2 + 610699^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (400011215651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 852010 + ... + 1235290.

Almost surely, 2^400011215650 is an apocalyptic number.

400011215650 is a deficient number, since it is larger than the sum of its proper divisors (344047231874).

400011215650 is a wasteful number, since it uses less digits than its factorization.

400011215650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404166 (or 404161 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 400011215650 its reverse (56512110004), we get a palindrome (456523325654).

The spelling of 400011215650 in words is "four hundred billion, eleven million, two hundred fifteen thousand, six hundred fifty".