8164425780 has 576 divisors, whose sum is σ = 32757903360. Its totient is φ = 1661700096.

The previous prime is 8164425739. The next prime is 8164425811. The reversal of 8164425780 is 875244618.

8164425780 is a `hidden beast` number, since 81 + 6 + 442 + 57 + 80 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 10988089 + ... + 10988831.

It is an arithmetic number, because the mean of its divisors is an integer number (56871360).

Almost surely, 2^8164425780 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 8164425780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16378951680).

8164425780 is an abundant number, since it is smaller than the sum of its proper divisors (24593477580).

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

8164425780 is a wasteful number, since it uses less digits than its factorization.

8164425780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 8164425780 is about 90357.2121083868. The cubic root of 8164425780 is about 2013.6093313306.

The spelling of 8164425780 in words is "eight billion, one hundred sixty-four million, four hundred twenty-five thousand, seven hundred eighty".