340861681838 has 4 divisors (see below), whose sum is σ = 511292522760. Its totient is φ = 170430840918.

The previous prime is 340861681817. The next prime is 340861681841. The reversal of 340861681838 is 838186168043.

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

It is a super-2 number, since 2×340861681838² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 85215420458 + ... + 85215420461.

It is an arithmetic number, because the mean of its divisors is an integer number (127823130690).

Almost surely, 2^340861681838 is an apocalyptic number.

340861681838 is a deficient number, since it is larger than the sum of its proper divisors (170430840922).

340861681838 is a wasteful number, since it uses less digits than its factorization.

340861681838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170430840921.

The product of its (nonzero) digits is 5308416, while the sum is 56.

The spelling of 340861681838 in words is "three hundred forty billion, eight hundred sixty-one million, six hundred eighty-one thousand, eight hundred thirty-eight".