400132122004520 has 16 divisors (see below), whose sum is σ = 900297274510260. Its totient is φ = 160052848801792.

The previous prime is 400132122004513. The next prime is 400132122004621. The reversal of 400132122004520 is 25400221231004.

It can be written as a sum of positive squares in 2 ways, for example, as 390278436877156 + 9853685127364 = 19755466^2 + 3139058^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 400132122004520.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5001651525017 + ... + 5001651525096.

Almost surely, 2^{400132122004520} is an apocalyptic number.

400132122004520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400132122004520 is an abundant number, since it is smaller than the sum of its proper divisors (500165152505740).

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

400132122004520 is a wasteful number, since it uses less digits than its factorization.

400132122004520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10003303050124 (or 10003303050120 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 400132122004520 its reverse (25400221231004), we get a palindrome (425532343235524).

The spelling of 400132122004520 in words is "four hundred trillion, one hundred thirty-two billion, one hundred twenty-two million, four thousand, five hundred twenty".