6478803720 has 96 divisors (see below), whose sum is σ = 21070759320. Its totient is φ = 1726479360.

The previous prime is 6478803703. The next prime is 6478803733. The reversal of 6478803720 is 273088746.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4350457764 + 2128345956 = 65958^2 + 46134^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 591090 + ... + 601950.

Almost surely, 2^6478803720 is an apocalyptic number.

6478803720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6478803720 is an abundant number, since it is smaller than the sum of its proper divisors (14591955600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6478803720 is a wasteful number, since it uses less digits than its factorization.

6478803720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12535 (or 12528 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 6478803720 is about 80491.0163931355. The cubic root of 6478803720 is about 1864.2247705826.

The spelling of 6478803720 in words is "six billion, four hundred seventy-eight million, eight hundred three thousand, seven hundred twenty".