4639472640 has 616 divisors, whose sum is σ = 18364341168. Its totient is φ = 1114767360.

The previous prime is 4639472633. The next prime is 4639472647. The reversal of 4639472640 is 462749364.

It is a happy number.

4639472640 is a `hidden beast` number, since 4 + 639 + 4 + 7 + 2 + 6 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (4639472633) and next prime (4639472647).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4639472647) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 41057224 + ... + 41057336.

Almost surely, 2^4639472640 is an apocalyptic number.

4639472640 is a gapful number since it is divisible by the number (40) 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 4639472640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9182170584).

4639472640 is an abundant number, since it is smaller than the sum of its proper divisors (13724868528).

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

4639472640 is a wasteful number, since it uses less digits than its factorization.

4639472640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The square root of 4639472640 is about 68113.6743980238. The cubic root of 4639472640 is about 1667.8469918133.

The spelling of 4639472640 in words is "four billion, six hundred thirty-nine million, four hundred seventy-two thousand, six hundred forty".