2061642240 has 320 divisors, whose sum is σ = 8371249920. Its totient is φ = 471121920.

The previous prime is 2061642227. The next prime is 2061642269. The reversal of 2061642240 is 422461602.

2061642240 is a `hidden beast` number, since 2 + 0 + 616 + 4 + 2 + 2 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 481710 + ... + 485970.

It is an arithmetic number, because the mean of its divisors is an integer number (26160156).

Almost surely, 2^2061642240 is an apocalyptic number.

2061642240 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 2061642240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4185624960).

2061642240 is an abundant number, since it is smaller than the sum of its proper divisors (6309607680).

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

2061642240 is an equidigital number, since it uses as much as digits as its factorization.

2061642240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300 (or 4278 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 2061642240 is about 45405.3107026039. The cubic root of 2061642240 is about 1272.7343570168.

The spelling of 2061642240 in words is "two billion, sixty-one million, six hundred forty-two thousand, two hundred forty".