6477078361 has 16 divisors (see below), whose sum is σ = 7149597840. Its totient is φ = 5829626880.

The previous prime is 6477078331. The next prime is 6477078367. The reversal of 6477078361 is 1638707746.

It can be written as a sum of positive squares in 8 ways, for example, as 3809975625 + 2667102736 = 61725^2 + 51644^2 .

It is a cyclic number.

It is not a de Polignac number, because 6477078361 - 2³¹ = 4329594713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6477078367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1580431 + ... + 1584523.

It is an arithmetic number, because the mean of its divisors is an integer number (446849865).

Almost surely, 2^6477078361 is an apocalyptic number.

It is an amenable number.

6477078361 is a deficient number, since it is larger than the sum of its proper divisors (672519479).

6477078361 is a wasteful number, since it uses less digits than its factorization.

6477078361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7116.

The product of its (nonzero) digits is 1185408, while the sum is 49.

The square root of 6477078361 is about 80480.2979678878. The cubic root of 6477078361 is about 1864.0592697335.

The spelling of 6477078361 in words is "six billion, four hundred seventy-seven million, seventy-eight thousand, three hundred sixty-one".