345778811 has 4 divisors (see below), whose sum is σ = 395175792. Its totient is φ = 296381832.

The previous prime is 345778721. The next prime is 345778831. The reversal of 345778811 is 118877543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118877543 = 4391 ⋅27073.

It is a cyclic number.

It is not a de Polignac number, because 345778811 - 2¹⁰ = 345777787 is a prime.

It is a super-2 number, since 2×345778811² = 239125972273147442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345778831) 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, 24698480 + ... + 24698493.

It is an arithmetic number, because the mean of its divisors is an integer number (98793948).

Almost surely, 2^345778811 is an apocalyptic number.

345778811 is a deficient number, since it is larger than the sum of its proper divisors (49396981).

345778811 is an equidigital number, since it uses as much as digits as its factorization.

345778811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49396980.

The product of its digits is 188160, while the sum is 44.

The square root of 345778811 is about 18595.1286900629. The cubic root of 345778811 is about 701.8852655945.

The spelling of 345778811 in words is "three hundred forty-five million, seven hundred seventy-eight thousand, eight hundred eleven".