2005042540387 has 2 divisors, whose sum is σ = 2005042540388. Its totient is φ = 2005042540386.

The previous prime is 2005042540381. The next prime is 2005042540531. The reversal of 2005042540387 is 7830452405002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2005042540387 is a prime.

It is a super-2 number, since 2×2005042540387² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2005042540381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002521270193 + 1002521270194.

It is an arithmetic number, because the mean of its divisors is an integer number (1002521270194).

Almost surely, 2^{2005042540387} is an apocalyptic number.

2005042540387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005042540387 is an equidigital number, since it uses as much as digits as its factorization.

2005042540387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268800, while the sum is 40.

Adding to 2005042540387 its reverse (7830452405002), we get a palindrome (9835494945389).

The spelling of 2005042540387 in words is "two trillion, five billion, forty-two million, five hundred forty thousand, three hundred eighty-seven".