340921256305 has 16 divisors (see below), whose sum is σ = 469213041024. Its totient is φ = 232942631040.

The previous prime is 340921256237. The next prime is 340921256321. The reversal of 340921256305 is 503652129043.

It is not a de Polignac number, because 340921256305 - 2²³ = 340912867697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17322207 + ... + 17341876.

It is an arithmetic number, because the mean of its divisors is an integer number (29325815064).

Almost surely, 2^340921256305 is an apocalyptic number.

340921256305 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

340921256305 is a deficient number, since it is larger than the sum of its proper divisors (128291784719).

340921256305 is a wasteful number, since it uses less digits than its factorization.

340921256305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34664376.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 340921256305 in words is "three hundred forty billion, nine hundred twenty-one million, two hundred fifty-six thousand, three hundred five".