1540504145442 has 16 divisors (see below), whose sum is σ = 3081159513792. Its totient is φ = 513476178000.

The previous prime is 1540504145437. The next prime is 1540504145473. The reversal of 1540504145442 is 2445414050451.

It is a self number, because there is not a number n which added to its sum of digits gives 1540504145442.

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, 6168309 + ... + 6413192.

It is an arithmetic number, because the mean of its divisors is an integer number (192572469612).

Almost surely, 2^{1540504145442} is an apocalyptic number.

1540504145442 is an abundant number, since it is smaller than the sum of its proper divisors (1540655368350).

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

1540504145442 is a wasteful number, since it uses less digits than its factorization.

1540504145442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12601913.

The product of its (nonzero) digits is 256000, while the sum is 39.

Adding to 1540504145442 its reverse (2445414050451), we get a palindrome (3985918195893).

The spelling of 1540504145442 in words is "one trillion, five hundred forty billion, five hundred four million, one hundred forty-five thousand, four hundred forty-two".