400004121210040 has 64 divisors (see below), whose sum is σ = 900465907017600. Its totient is φ = 159920474284032.

The previous prime is 400004121209993. The next prime is 400004121210077. The reversal of 400004121210040 is 40012121400004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3257592966 + ... + 3257715754.

It is an arithmetic number, because the mean of its divisors is an integer number (14069779797150).

Almost surely, 2^{400004121210040} is an apocalyptic number.

400004121210040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400004121210040 is an abundant number, since it is smaller than the sum of its proper divisors (500461785807560).

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

400004121210040 is a wasteful number, since it uses less digits than its factorization.

400004121210040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163456 (or 163452 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 400004121210040 its reverse (40012121400004), we get a palindrome (440016242610044).

The spelling of 400004121210040 in words is "four hundred trillion, four billion, one hundred twenty-one million, two hundred ten thousand, forty".