4721317840 has 20 divisors (see below), whose sum is σ = 10977064164. Its totient is φ = 1888527104.

The previous prime is 4721317831. The next prime is 4721317859. The reversal of 4721317840 is 487131274.

It can be written as a sum of positive squares in 2 ways, for example, as 1942341184 + 2778976656 = 44072^2 + 52716^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 4721317840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29508157 + ... + 29508316.

Almost surely, 2^4721317840 is an apocalyptic number.

4721317840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4721317840 is an abundant number, since it is smaller than the sum of its proper divisors (6255746324).

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

4721317840 is a wasteful number, since it uses less digits than its factorization.

4721317840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59016486 (or 59016480 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 4721317840 is about 68711.8464313105. The cubic root of 4721317840 is about 1677.5974065446.

The spelling of 4721317840 in words is "four billion, seven hundred twenty-one million, three hundred seventeen thousand, eight hundred forty".