2005401544540 has 12 divisors (see below), whose sum is σ = 4211343243576. Its totient is φ = 802160617808.

The previous prime is 2005401544511. The next prime is 2005401544583. The reversal of 2005401544540 is 454451045002.

It is a junction number, because it is equal to n+sod(n) for n = 2005401544496 and 2005401544505.

It is a congruent number.

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, 50135038594 + ... + 50135038633.

It is an arithmetic number, because the mean of its divisors is an integer number (350945270298).

Almost surely, 2^{2005401544540} is an apocalyptic number.

2005401544540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2005401544540 is an abundant number, since it is smaller than the sum of its proper divisors (2205941699036).

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

2005401544540 is a wasteful number, since it uses less digits than its factorization.

2005401544540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100270077236 (or 100270077234 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 34.

Adding to 2005401544540 its reverse (454451045002), we get a palindrome (2459852589542).

The spelling of 2005401544540 in words is "two trillion, five billion, four hundred one million, five hundred forty-four thousand, five hundred forty".