349853777556505 has 4 divisors (see below), whose sum is σ = 419824533067812. Its totient is φ = 279883022045200.

The previous prime is 349853777556461. The next prime is 349853777556581. The reversal of 349853777556505 is 505655777358943.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 257711747880409 + 92142029676096 = 16053403^2 + 9599064^2 .

It is not a de Polignac number, because 349853777556505 - 2²⁵ = 349853744002073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34985377755646 + ... + 34985377755655.

It is an arithmetic number, because the mean of its divisors is an integer number (104956133266953).

Almost surely, 2^{349853777556505} is an apocalyptic number.

It is an amenable number.

349853777556505 is a deficient number, since it is larger than the sum of its proper divisors (69970755511307).

349853777556505 is an equidigital number, since it uses as much as digits as its factorization.

349853777556505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69970755511306.

The product of its (nonzero) digits is 16669800000, while the sum is 79.

The spelling of 349853777556505 in words is "three hundred forty-nine trillion, eight hundred fifty-three billion, seven hundred seventy-seven million, five hundred fifty-six thousand, five hundred five".