1543440355545 has 64 divisors (see below), whose sum is σ = 2813028839424. Its totient is φ = 715316363520.

The previous prime is 1543440355543. The next prime is 1543440355603. The reversal of 1543440355545 is 5455530443451.

It is a happy number.

It is not a de Polignac number, because 1543440355545 - 2¹ = 1543440355543 is a prime.

It is a super-2 number, since 2×1543440355545² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1543440355494 and 1543440355503.

It is not an unprimeable number, because it can be changed into a prime (1543440355543) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5529732 + ... + 5802138.

It is an arithmetic number, because the mean of its divisors is an integer number (43953575616).

Almost surely, 2^{1543440355545} is an apocalyptic number.

1543440355545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1543440355545 is a deficient number, since it is larger than the sum of its proper divisors (1269588483879).

1543440355545 is a wasteful number, since it uses less digits than its factorization.

1543440355545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273942.

The product of its (nonzero) digits is 7200000, while the sum is 48.

Adding to 1543440355545 its reverse (5455530443451), we get a palindrome (6998970798996).

The spelling of 1543440355545 in words is "one trillion, five hundred forty-three billion, four hundred forty million, three hundred fifty-five thousand, five hundred forty-five".