345640621856 has 12 divisors (see below), whose sum is σ = 680479974342. Its totient is φ = 172820310912.

The previous prime is 345640621793. The next prime is 345640621861. The reversal of 345640621856 is 658126046543.

It can be written as a sum of positive squares in only one way, i.e., 324649248400 + 20991373456 = 569780^2 + 144884^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5400634685 + ... + 5400634748.

Almost surely, 2^345640621856 is an apocalyptic number.

It is an amenable number.

345640621856 is a deficient number, since it is larger than the sum of its proper divisors (334839352486).

345640621856 is a wasteful number, since it uses less digits than its factorization.

345640621856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10801269443 (or 10801269435 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 50.

The spelling of 345640621856 in words is "three hundred forty-five billion, six hundred forty million, six hundred twenty-one thousand, eight hundred fifty-six".