6426942691 has 4 divisors (see below), whose sum is σ = 6921322912. Its totient is φ = 5932562472.

The previous prime is 6426942673. The next prime is 6426942707. The reversal of 6426942691 is 1962496246.

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

It is a cyclic number.

It is not a de Polignac number, because 6426942691 - 2³¹ = 4279459043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6426942391) 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, 247190091 + ... + 247190116.

It is an arithmetic number, because the mean of its divisors is an integer number (1730330728).

Almost surely, 2^6426942691 is an apocalyptic number.

6426942691 is a deficient number, since it is larger than the sum of its proper divisors (494380221).

6426942691 is a wasteful number, since it uses less digits than its factorization.

6426942691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494380220.

The product of its digits is 1119744, while the sum is 49.

The square root of 6426942691 is about 80168.2149670304. The cubic root of 6426942691 is about 1859.2372379241.

The spelling of 6426942691 in words is "six billion, four hundred twenty-six million, nine hundred forty-two thousand, six hundred ninety-one".