6940218458 has 8 divisors (see below), whose sum is σ = 10423198260. Its totient is φ = 3465819040.

The previous prime is 6940218451. The next prime is 6940218463. The reversal of 6940218458 is 8548120496.

It can be written as a sum of positive squares in 2 ways, for example, as 5114109169 + 1826109289 = 71513^2 + 42733^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (6940218451) 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, 2143073 + ... + 2146308.

Almost surely, 2^6940218458 is an apocalyptic number.

6940218458 is a deficient number, since it is larger than the sum of its proper divisors (3482979802).

6940218458 is a wasteful number, since it uses less digits than its factorization.

6940218458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4290192.

The product of its (nonzero) digits is 552960, while the sum is 47.

The square root of 6940218458 is about 83307.9735559568. The cubic root of 6940218458 is about 1907.4699886432.

The spelling of 6940218458 in words is "six billion, nine hundred forty million, two hundred eighteen thousand, four hundred fifty-eight".