1540543523423 has 8 divisors (see below), whose sum is σ = 1544769918480. Its totient is φ = 1536317979840.

The previous prime is 1540543523371. The next prime is 1540543523429. The reversal of 1540543523423 is 3243253450451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1540543523423 - 2³⁰ = 1539469781599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540543523429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3499211 + ... + 3914787.

It is an arithmetic number, because the mean of its divisors is an integer number (193096239810).

Almost surely, 2^{1540543523423} is an apocalyptic number.

1540543523423 is a deficient number, since it is larger than the sum of its proper divisors (4226395057).

1540543523423 is an equidigital number, since it uses as much as digits as its factorization.

1540543523423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425737.

The product of its (nonzero) digits is 864000, while the sum is 41.

Adding to 1540543523423 its reverse (3243253450451), we get a palindrome (4783796973874).

The spelling of 1540543523423 in words is "one trillion, five hundred forty billion, five hundred forty-three million, five hundred twenty-three thousand, four hundred twenty-three".