6448143780 has 96 divisors (see below), whose sum is σ = 21604060800. Its totient is φ = 1587233664.

The previous prime is 6448143769. The next prime is 6448143787. The reversal of 6448143780 is 873418446.

6448143780 is a `hidden beast` number, since 64 + 4 + 81 + 437 + 80 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (6448143787) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 452250 + ... + 466289.

It is an arithmetic number, because the mean of its divisors is an integer number (225042300).

Almost surely, 2^6448143780 is an apocalyptic number.

6448143780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6448143780 is an abundant number, since it is smaller than the sum of its proper divisors (15155917020).

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

6448143780 is a wasteful number, since it uses less digits than its factorization.

6448143780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918570 (or 918562 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The square root of 6448143780 is about 80300.3348685421. The cubic root of 6448143780 is about 1861.2794007200.

The spelling of 6448143780 in words is "six billion, four hundred forty-eight million, one hundred forty-three thousand, seven hundred eighty".