2061784890 has 96 divisors (see below), whose sum is σ = 6036705792. Its totient is φ = 483696000.

The previous prime is 2061784889. The next prime is 2061784979. The reversal of 2061784890 is 984871602.

2061784890 is a `hidden beast` number, since 20 + 617 + 8 + 4 + 8 + 9 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2901 + ... + 64280.

It is an arithmetic number, because the mean of its divisors is an integer number (62882352).

Almost surely, 2^2061784890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2061784890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3018352896).

2061784890 is an abundant number, since it is smaller than the sum of its proper divisors (3974920902).

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

2061784890 is a wasteful number, since it uses less digits than its factorization.

2061784890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67236 (or 67233 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 2061784890 is about 45406.8815269228. The cubic root of 2061784890 is about 1272.7637108600.

The spelling of 2061784890 in words is "two billion, sixty-one million, seven hundred eighty-four thousand, eight hundred ninety".