1000401522440 has 16 divisors (see below), whose sum is σ = 2250903425580. Its totient is φ = 400160608960.

The previous prime is 1000401522437. The next prime is 1000401522451. The reversal of 1000401522440 is 442251040001.

1000401522440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 997237909924 + 3163612516 = 998618^2 + 56246^2 .

It is a super-3 number, since 3×1000401522440³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 12505018991 + ... + 12505019070.

Almost surely, 2^{1000401522440} is an apocalyptic number.

1000401522440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000401522440 is an abundant number, since it is smaller than the sum of its proper divisors (1250501903140).

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

1000401522440 is a wasteful number, since it uses less digits than its factorization.

1000401522440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25010038072 (or 25010038068 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 1000401522440 its reverse (442251040001), we get a palindrome (1442652562441).

The spelling of 1000401522440 in words is "one trillion, four hundred one million, five hundred twenty-two thousand, four hundred forty".