1540013125444 has 12 divisors (see below), whose sum is σ = 2699294008768. Its totient is φ = 768786265800.

The previous prime is 1540013125423. The next prime is 1540013125459. The reversal of 1540013125444 is 4445213100451.

It is a happy 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, 305071392 + ... + 305076439.

Almost surely, 2^{1540013125444} is an apocalyptic number.

It is an amenable number.

1540013125444 is a deficient number, since it is larger than the sum of its proper divisors (1159280883324).

1540013125444 is a wasteful number, since it uses less digits than its factorization.

1540013125444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610148466 (or 610148464 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 1540013125444 its reverse (4445213100451), we get a palindrome (5985226225895).

The spelling of 1540013125444 in words is "one trillion, five hundred forty billion, thirteen million, one hundred twenty-five thousand, four hundred forty-four".