8378661560 has 64 divisors (see below), whose sum is σ = 18947757600. Its totient is φ = 3334496256.

The previous prime is 8378661539. The next prime is 8378661611. The reversal of 8378661560 is 651668738.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 8378661499 and 8378661508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12449384 + ... + 12450056.

Almost surely, 2^8378661560 is an apocalyptic number.

It is an amenable number.

8378661560 is an abundant number, since it is smaller than the sum of its proper divisors (10569096040).

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

8378661560 is a wasteful number, since it uses less digits than its factorization.

8378661560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800 (or 1796 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 8378661560 is about 91535.0291418537. The cubic root of 8378661560 is about 2031.0699593829.

The spelling of 8378661560 in words is "eight billion, three hundred seventy-eight million, six hundred sixty-one thousand, five hundred sixty".