6478675861 has 8 divisors (see below), whose sum is σ = 7525581824. Its totient is φ = 5462115120.

The previous prime is 6478675859. The next prime is 6478675867. The reversal of 6478675861 is 1685768746.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6478675861 - 2¹ = 6478675859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6478675796 and 6478675805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6478675867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7585845 + ... + 7586698.

It is an arithmetic number, because the mean of its divisors is an integer number (940697728).

Almost surely, 2^6478675861 is an apocalyptic number.

6478675861 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

6478675861 is a deficient number, since it is larger than the sum of its proper divisors (1046905963).

6478675861 is a wasteful number, since it uses less digits than its factorization.

6478675861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15172611.

The product of its digits is 13547520, while the sum is 58.

The square root of 6478675861 is about 80490.2221453016. Note that the first 3 decimals coincide. The cubic root of 6478675861 is about 1864.2125070284.

The spelling of 6478675861 in words is "six billion, four hundred seventy-eight million, six hundred seventy-five thousand, eight hundred sixty-one".