6291745840 has 40 divisors (see below), whose sum is σ = 14876257680. Its totient is φ = 2474040576.

The previous prime is 6291745819. The next prime is 6291745877. The reversal of 6291745840 is 485471926.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 661779 + ... + 671218.

It is an arithmetic number, because the mean of its divisors is an integer number (371906442).

Almost surely, 2^6291745840 is an apocalyptic number.

It is an amenable number.

6291745840 is an abundant number, since it is smaller than the sum of its proper divisors (8584511840).

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

6291745840 is a wasteful number, since it uses less digits than its factorization.

6291745840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333069 (or 1333063 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 6291745840 is about 79320.5259690075. The cubic root of 6291745840 is about 1846.1077984633.

The spelling of 6291745840 in words is "six billion, two hundred ninety-one million, seven hundred forty-five thousand, eight hundred forty".