6401916388 has 24 divisors (see below), whose sum is σ = 12858797952. Its totient is φ = 2731900224.

The previous prime is 6401916383. The next prime is 6401916401. The reversal of 6401916388 is 8836191046.

It is not an unprimeable number, because it can be changed into a prime (6401916383) 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, 484120 + ... + 497167.

It is an arithmetic number, because the mean of its divisors is an integer number (535783248).

Almost surely, 2^6401916388 is an apocalyptic number.

It is an amenable number.

6401916388 is an abundant number, since it is smaller than the sum of its proper divisors (6456881564).

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

6401916388 is a wasteful number, since it uses less digits than its factorization.

6401916388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981531 (or 981529 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 6401916388 is about 80011.9765285173. The cubic root of 6401916388 is about 1856.8208292254.

The spelling of 6401916388 in words is "six billion, four hundred one million, nine hundred sixteen thousand, three hundred eighty-eight".