6172778450679 has 4 divisors (see below), whose sum is σ = 8230371267576. Its totient is φ = 4115185633784.

The previous prime is 6172778450677. The next prime is 6172778450747. The reversal of 6172778450679 is 9760548772716.

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 6172778450679 - 2¹ = 6172778450677 is a prime.

It is a super-2 number, since 2×6172778450679² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6172778450677) 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, 1028796408444 + ... + 1028796408449.

It is an arithmetic number, because the mean of its divisors is an integer number (2057592816894).

Almost surely, 2^{6172778450679} is an apocalyptic number.

6172778450679 is a deficient number, since it is larger than the sum of its proper divisors (2057592816897).

6172778450679 is a wasteful number, since it uses less digits than its factorization.

6172778450679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057592816896.

The product of its (nonzero) digits is 248935680, while the sum is 69.

The spelling of 6172778450679 in words is "six trillion, one hundred seventy-two billion, seven hundred seventy-eight million, four hundred fifty thousand, six hundred seventy-nine".