349618913281 has 4 divisors (see below), whose sum is σ = 381402450864. Its totient is φ = 317835375700.

The previous prime is 349618913279. The next prime is 349618913311. The reversal of 349618913281 is 182319816943.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 182319816943 = 11 ⋅16574528813.

It is a cyclic number.

It is not a de Polignac number, because 349618913281 - 2¹ = 349618913279 is a prime.

It is a super-2 number, since 2×349618913281² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349618913881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15891768775 + ... + 15891768796.

It is an arithmetic number, because the mean of its divisors is an integer number (95350612716).

Almost surely, 2^349618913281 is an apocalyptic number.

It is an amenable number.

349618913281 is a deficient number, since it is larger than the sum of its proper divisors (31783537583).

349618913281 is a wasteful number, since it uses less digits than its factorization.

349618913281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31783537582.

The product of its digits is 2239488, while the sum is 55.

The spelling of 349618913281 in words is "three hundred forty-nine billion, six hundred eighteen million, nine hundred thirteen thousand, two hundred eighty-one".