6434615620 has 72 divisors (see below), whose sum is σ = 14312700864. Its totient is φ = 2429600832.

The previous prime is 6434615611. The next prime is 6434615633. The reversal of 6434615620 is 265164346.

It is a self number, because there is not a number n which added to its sum of digits gives 6434615620.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2215089 + ... + 2217991.

It is an arithmetic number, because the mean of its divisors is an integer number (198787512).

Almost surely, 2^6434615620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6434615620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7156350432).

6434615620 is an abundant number, since it is smaller than the sum of its proper divisors (7878085244).

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

6434615620 is a wasteful number, since it uses less digits than its factorization.

6434615620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257 (or 3236 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 6434615620 is about 80216.0558741204. The cubic root of 6434615620 is about 1859.9768390379.

Adding to 6434615620 its reverse (265164346), we get a palindrome (6699779966).

The spelling of 6434615620 in words is "six billion, four hundred thirty-four million, six hundred fifteen thousand, six hundred twenty".