6840779901 has 4 divisors (see below), whose sum is σ = 9121039872. Its totient is φ = 4560519932.

The previous prime is 6840779879. The next prime is 6840779909. The reversal of 6840779901 is 1099770486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6840779901 - 2⁶ = 6840779837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6840779909) 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 3 ways as a sum of consecutive naturals, for example, 1140129981 + ... + 1140129986.

It is an arithmetic number, because the mean of its divisors is an integer number (2280259968).

Almost surely, 2^6840779901 is an apocalyptic number.

It is an amenable number.

6840779901 is a deficient number, since it is larger than the sum of its proper divisors (2280259971).

6840779901 is a wasteful number, since it uses less digits than its factorization.

6840779901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280259970.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 6840779901 is about 82709.0073752551. The cubic root of 6840779901 is about 1898.3161351792.

The spelling of 6840779901 in words is "six billion, eight hundred forty million, seven hundred seventy-nine thousand, nine hundred one".