349688876618 has 4 divisors (see below), whose sum is σ = 524533314930. Its totient is φ = 174844438308.

The previous prime is 349688876587. The next prime is 349688876627. The reversal of 349688876618 is 816678886943.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 816678886943 = 25603 ⋅31897781.

It can be written as a sum of positive squares in only one way, i.e., 334561598569 + 15127278049 = 578413^2 + 122993^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87422219153 + ... + 87422219156.

Almost surely, 2^349688876618 is an apocalyptic number.

349688876618 is a deficient number, since it is larger than the sum of its proper divisors (174844438312).

349688876618 is a wasteful number, since it uses less digits than its factorization.

349688876618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174844438311.

The product of its digits is 668860416, while the sum is 74.

The spelling of 349688876618 in words is "three hundred forty-nine billion, six hundred eighty-eight million, eight hundred seventy-six thousand, six hundred eighteen".