6340994771 has 4 divisors (see below), whose sum is σ = 6435636552. Its totient is φ = 6246352992.

The previous prime is 6340994753. The next prime is 6340994819. The reversal of 6340994771 is 1774990436.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6340994771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6340994711) 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, 47320790 + ... + 47320923.

It is an arithmetic number, because the mean of its divisors is an integer number (1608909138).

Almost surely, 2^6340994771 is an apocalyptic number.

6340994771 is a deficient number, since it is larger than the sum of its proper divisors (94641781).

6340994771 is an equidigital number, since it uses as much as digits as its factorization.

6340994771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94641780.

The product of its (nonzero) digits is 1143072, while the sum is 50.

The square root of 6340994771 is about 79630.3633735273. The cubic root of 6340994771 is about 1850.9121161807.

The spelling of 6340994771 in words is "six billion, three hundred forty million, nine hundred ninety-four thousand, seven hundred seventy-one".