340521143405 has 8 divisors (see below), whose sum is σ = 408630837984. Its totient is φ = 272413270800.

The previous prime is 340521143393. The next prime is 340521143477. The reversal of 340521143405 is 504341125043.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 340521143405 - 2³⁰ = 339447401581 is a prime.

It is a Duffinian number.

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, 3551 + ... + 825260.

It is an arithmetic number, because the mean of its divisors is an integer number (51078854748).

Almost surely, 2^340521143405 is an apocalyptic number.

It is an amenable number.

340521143405 is a deficient number, since it is larger than the sum of its proper divisors (68109694579).

340521143405 is an equidigital number, since it uses as much as digits as its factorization.

340521143405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910987.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 340521143405 its reverse (504341125043), we get a palindrome (844862268448).

The spelling of 340521143405 in words is "three hundred forty billion, five hundred twenty-one million, one hundred forty-three thousand, four hundred five".