6428970777 has 32 divisors (see below), whose sum is σ = 9099417600. Its totient is φ = 4026198528.

The previous prime is 6428970761. The next prime is 6428970781. The reversal of 6428970777 is 7770798246.

It is a happy number.

It is not a de Polignac number, because 6428970777 - 2⁴ = 6428970761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (6428970077) 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 31 ways as a sum of consecutive naturals, for example, 6919849 + ... + 6920777.

It is an arithmetic number, because the mean of its divisors is an integer number (284356800).

Almost surely, 2^6428970777 is an apocalyptic number.

It is an amenable number.

6428970777 is a deficient number, since it is larger than the sum of its proper divisors (2670446823).

6428970777 is a wasteful number, since it uses less digits than its factorization.

6428970777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845.

The product of its (nonzero) digits is 8297856, while the sum is 57.

The square root of 6428970777 is about 80180.8629100486. The cubic root of 6428970777 is about 1859.4327843208.

The spelling of 6428970777 in words is "six billion, four hundred twenty-eight million, nine hundred seventy thousand, seven hundred seventy-seven".