6470745840 has 240 divisors, whose sum is σ = 23647111488. Its totient is φ = 1576157184.

The previous prime is 6470745833. The next prime is 6470745857. The reversal of 6470745840 is 485470746.

6470745840 is a `hidden beast` number, since 64 + 7 + 0 + 7 + 4 + 584 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 904357 + ... + 911483.

Almost surely, 2^6470745840 is an apocalyptic number.

6470745840 is a gapful number since it is divisible by the number (60) 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 6470745840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11823555744).

6470745840 is an abundant number, since it is smaller than the sum of its proper divisors (17176365648).

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

6470745840 is a wasteful number, since it uses less digits than its factorization.

6470745840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7256 (or 7247 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The square root of 6470745840 is about 80440.9462898094. The cubic root of 6470745840 is about 1863.4515861032.

The spelling of 6470745840 in words is "six billion, four hundred seventy million, seven hundred forty-five thousand, eight hundred forty".