340642031563 has 4 divisors (see below), whose sum is σ = 358570559560. Its totient is φ = 322713503568.

The previous prime is 340642031551. The next prime is 340642031581. The reversal of 340642031563 is 365130246043.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340642031563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340642031263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8964263970 + ... + 8964264007.

It is an arithmetic number, because the mean of its divisors is an integer number (89642639890).

Almost surely, 2^340642031563 is an apocalyptic number.

340642031563 is a deficient number, since it is larger than the sum of its proper divisors (17928527997).

340642031563 is a wasteful number, since it uses less digits than its factorization.

340642031563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17928527996.

The product of its (nonzero) digits is 155520, while the sum is 37.

The spelling of 340642031563 in words is "three hundred forty billion, six hundred forty-two million, thirty-one thousand, five hundred sixty-three".