1540401543442 has 16 divisors (see below), whose sum is σ = 2320451999712. Its totient is φ = 766919248000.

The previous prime is 1540401543403. The next prime is 1540401543469. The reversal of 1540401543442 is 2443451040451.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1391553 + ... + 2239915.

It is an arithmetic number, because the mean of its divisors is an integer number (145028249982).

Almost surely, 2^{1540401543442} is an apocalyptic number.

1540401543442 is a deficient number, since it is larger than the sum of its proper divisors (780050456270).

1540401543442 is a wasteful number, since it uses less digits than its factorization.

1540401543442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852233.

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 1540401543442 its reverse (2443451040451), we get a palindrome (3983852583893).

The spelling of 1540401543442 in words is "one trillion, five hundred forty billion, four hundred one million, five hundred forty-three thousand, four hundred forty-two".