340342623543 has 16 divisors (see below), whose sum is σ = 488707565696. Its totient is φ = 209437129440.

The previous prime is 340342623529. The next prime is 340342623553. The reversal of 340342623543 is 345326243043.

It is not a de Polignac number, because 340342623543 - 2¹⁷ = 340342492471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340342623503) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3517296 + ... + 3612762.

It is an arithmetic number, because the mean of its divisors is an integer number (30544222856).

Almost surely, 2^340342623543 is an apocalyptic number.

340342623543 is a deficient number, since it is larger than the sum of its proper divisors (148364942153).

340342623543 is a wasteful number, since it uses less digits than its factorization.

340342623543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186894.

The product of its (nonzero) digits is 622080, while the sum is 39.

Adding to 340342623543 its reverse (345326243043), we get a palindrome (685668866586).

The spelling of 340342623543 in words is "three hundred forty billion, three hundred forty-two million, six hundred twenty-three thousand, five hundred forty-three".