208742135342 has 16 divisors (see below), whose sum is σ = 340182899280. Its totient is φ = 95489933952.

The previous prime is 208742135323. The next prime is 208742135461. The reversal of 208742135342 is 243531247802.

It is a self number, because there is not a number n which added to its sum of digits gives 208742135342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35521592 + ... + 35527467.

It is an arithmetic number, because the mean of its divisors is an integer number (21261431205).

Almost surely, 2^208742135342 is an apocalyptic number.

208742135342 is a deficient number, since it is larger than the sum of its proper divisors (131440763938).

208742135342 is a wasteful number, since it uses less digits than its factorization.

208742135342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71049187.

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 208742135342 in words is "two hundred eight billion, seven hundred forty-two million, one hundred thirty-five thousand, three hundred forty-two".