6408778552 has 96 divisors (see below), whose sum is σ = 13969468800. Its totient is φ = 2749824000.

The previous prime is 6408778529. The next prime is 6408778561. The reversal of 6408778552 is 2558778046.

It is a self number, because there is not a number n which added to its sum of digits gives 6408778552.

It is a congruent number.

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, 1227724 + ... + 1232932.

It is an arithmetic number, because the mean of its divisors is an integer number (145515300).

Almost surely, 2^6408778552 is an apocalyptic number.

6408778552 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6408778552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6984734400).

6408778552 is an abundant number, since it is smaller than the sum of its proper divisors (7560690248).

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

6408778552 is a wasteful number, since it uses less digits than its factorization.

6408778552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5309 (or 5294 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 52.

The square root of 6408778552 is about 80054.8471486893. The cubic root of 6408778552 is about 1857.4840295533.

The spelling of 6408778552 in words is "six billion, four hundred eight million, seven hundred seventy-eight thousand, five hundred fifty-two".