208641400345 has 8 divisors (see below), whose sum is σ = 286136777664. Its totient is φ = 143068388784.

The previous prime is 208641400321. The next prime is 208641400381. The reversal of 208641400345 is 543004146802.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208641400345 is a prime.

It is a super-2 number, since 2×208641400345² (a number of 23 digits) contains 22 as substring.

It is a Duffinian 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, 2980591399 + ... + 2980591468.

It is an arithmetic number, because the mean of its divisors is an integer number (35767097208).

Almost surely, 2^208641400345 is an apocalyptic number.

It is an amenable number.

208641400345 is a deficient number, since it is larger than the sum of its proper divisors (77495377319).

208641400345 is an equidigital number, since it uses as much as digits as its factorization.

208641400345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5961182879.

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 208641400345 in words is "two hundred eight billion, six hundred forty-one million, four hundred thousand, three hundred forty-five".