2195678520 has 384 divisors, whose sum is σ = 8734003200. Its totient is φ = 466956288.

The previous prime is 2195678519. The next prime is 2195678533. The reversal of 2195678520 is 258765912.

2195678520 is a `hidden beast` number, since 2 + 1 + 9 + 56 + 78 + 520 = 666.

2195678520 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4583641 + ... + 4584119.

It is an arithmetic number, because the mean of its divisors is an integer number (22744800).

Almost surely, 2^2195678520 is an apocalyptic number.

2195678520 is a gapful number since it is divisible by the number (20) 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 2195678520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4367001600).

2195678520 is an abundant number, since it is smaller than the sum of its proper divisors (6538324680).

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

2195678520 is a wasteful number, since it uses less digits than its factorization.

2195678520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 2195678520 is about 46858.0678218810. The cubic root of 2195678520 is about 1299.7393007806.

The spelling of 2195678520 in words is "two billion, one hundred ninety-five million, six hundred seventy-eight thousand, five hundred twenty".