8619530640 has 320 divisors, whose sum is σ = 31266570240. Its totient is φ = 1923747840.

The previous prime is 8619530639. The next prime is 8619530653. The reversal of 8619530640 is 460359168.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 8619530592 and 8619530601.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15148276 + ... + 15148844.

It is an arithmetic number, because the mean of its divisors is an integer number (97708032).

Almost surely, 2^8619530640 is an apocalyptic number.

8619530640 is a gapful number since it is divisible by the number (80) 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 8619530640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15633285120).

8619530640 is an abundant number, since it is smaller than the sum of its proper divisors (22647039600).

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

8619530640 is a wasteful number, since it uses less digits than its factorization.

8619530640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 8619530640 is about 92841.4273910090. The cubic root of 8619530640 is about 2050.3493864146.

The spelling of 8619530640 in words is "eight billion, six hundred nineteen million, five hundred thirty thousand, six hundred forty".