400010412120520 has 32 divisors (see below), whose sum is σ = 900025121476800. Its totient is φ = 160003863656128.

The previous prime is 400010412120509. The next prime is 400010412120601. The reversal of 400010412120520 is 25021214010004.

It is a junction number, because it is equal to n+sod(n) for n = 400010412120491 and 400010412120500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12746877 + ... + 31024243.

It is an arithmetic number, because the mean of its divisors is an integer number (28125785046150).

Almost surely, 2^{400010412120520} is an apocalyptic number.

400010412120520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400010412120520 is an abundant number, since it is smaller than the sum of its proper divisors (500014709356280).

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

400010412120520 is a wasteful number, since it uses less digits than its factorization.

400010412120520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18824517 (or 18824513 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 400010412120520 its reverse (25021214010004), we get a palindrome (425031626130524).

The spelling of 400010412120520 in words is "four hundred trillion, ten billion, four hundred twelve million, one hundred twenty thousand, five hundred twenty".