6940218461 has 16 divisors (see below), whose sum is σ = 7827019200. Its totient is φ = 6098889600.

The previous prime is 6940218451. The next prime is 6940218463. The reversal of 6940218461 is 1648120496.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6940218461 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6940218463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21431 + ... + 119748.

It is an arithmetic number, because the mean of its divisors is an integer number (489188700).

Almost surely, 2^6940218461 is an apocalyptic number.

It is an amenable number.

6940218461 is a deficient number, since it is larger than the sum of its proper divisors (886800739).

6940218461 is a wasteful number, since it uses less digits than its factorization.

6940218461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141340.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 6940218461 is about 83307.9735739623. The cubic root of 6940218461 is about 1907.4699889181.

The spelling of 6940218461 in words is "six billion, nine hundred forty million, two hundred eighteen thousand, four hundred sixty-one".