6940805155 has 4 divisors (see below), whose sum is σ = 8328966192. Its totient is φ = 5552644120.

The previous prime is 6940805093. The next prime is 6940805159. The reversal of 6940805155 is 5515080496.

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

It is not a de Polignac number, because 6940805155 - 2⁹ = 6940804643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6940805159) 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, 694080511 + ... + 694080520.

It is an arithmetic number, because the mean of its divisors is an integer number (2082241548).

Almost surely, 2^6940805155 is an apocalyptic number.

6940805155 is a deficient number, since it is larger than the sum of its proper divisors (1388161037).

6940805155 is a wasteful number, since it uses less digits than its factorization.

6940805155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388161036.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 6940805155 is about 83311.4947351204. The cubic root of 6940805155 is about 1907.5237369699.

The spelling of 6940805155 in words is "six billion, nine hundred forty million, eight hundred five thousand, one hundred fifty-five".