340981138709 has 4 divisors (see below), whose sum is σ = 346070409504. Its totient is φ = 335891867916.

The previous prime is 340981138703. The next prime is 340981138717. The reversal of 340981138709 is 907831189043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340981138709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340981138703) 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, 2544635297 + ... + 2544635430.

It is an arithmetic number, because the mean of its divisors is an integer number (86517602376).

Almost surely, 2^340981138709 is an apocalyptic number.

It is an amenable number.

340981138709 is a deficient number, since it is larger than the sum of its proper divisors (5089270795).

340981138709 is an equidigital number, since it uses as much as digits as its factorization.

340981138709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5089270794.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 340981138709 in words is "three hundred forty billion, nine hundred eighty-one million, one hundred thirty-eight thousand, seven hundred nine".