1005405240044 has 24 divisors (see below), whose sum is σ = 1797946476480. Its totient is φ = 491718770816.

The previous prime is 1005405240031. The next prime is 1005405240067. The reversal of 1005405240044 is 4400425045001.

It is a super-2 number, since 2×1005405240044² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1005405239989 and 1005405240016.

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, 1243337 + ... + 1885920.

It is an arithmetic number, because the mean of its divisors is an integer number (74914436520).

Almost surely, 2^{1005405240044} is an apocalyptic number.

It is an amenable number.

1005405240044 is a deficient number, since it is larger than the sum of its proper divisors (792541236436).

1005405240044 is a wasteful number, since it uses less digits than its factorization.

1005405240044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131017 (or 3131015 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The spelling of 1005405240044 in words is "one trillion, five billion, four hundred five million, two hundred forty thousand, forty-four".