1540243233445 has 16 divisors (see below), whose sum is σ = 2180473371648. Its totient is φ = 1022096891520.

The previous prime is 1540243233413. The next prime is 1540243233449. The reversal of 1540243233445 is 5443323420451.

It is not a de Polignac number, because 1540243233445 - 2⁵ = 1540243233413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1540243233398 and 1540243233407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540243233449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 709788424 + ... + 709790593.

It is an arithmetic number, because the mean of its divisors is an integer number (136279585728).

Almost surely, 2^{1540243233445} is an apocalyptic number.

It is an amenable number.

1540243233445 is a deficient number, since it is larger than the sum of its proper divisors (640230138203).

1540243233445 is a wasteful number, since it uses less digits than its factorization.

1540243233445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419579060.

The product of its (nonzero) digits is 691200, while the sum is 40.

Adding to 1540243233445 its reverse (5443323420451), we get a palindrome (6983566653896).

The spelling of 1540243233445 in words is "one trillion, five hundred forty billion, two hundred forty-three million, two hundred thirty-three thousand, four hundred forty-five".