6419476778 has 32 divisors (see below), whose sum is σ = 11804510592. Its totient is φ = 2576376000.

The previous prime is 6419476771. The next prime is 6419476783. The reversal of 6419476778 is 8776749146.

It is a happy number.

It is a super-2 number, since 2×6419476778² = 82419364206562522568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6419476771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481373 + ... + 494528.

It is an arithmetic number, because the mean of its divisors is an integer number (368890956).

Almost surely, 2^6419476778 is an apocalyptic number.

6419476778 is a deficient number, since it is larger than the sum of its proper divisors (5385033814).

6419476778 is a wasteful number, since it uses less digits than its factorization.

6419476778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975950.

The product of its digits is 14224896, while the sum is 59.

The square root of 6419476778 is about 80121.6373896590. The cubic root of 6419476778 is about 1858.5170260203.

The spelling of 6419476778 in words is "six billion, four hundred nineteen million, four hundred seventy-six thousand, seven hundred seventy-eight".