2065236640 has 96 divisors (see below), whose sum is σ = 4987713024. Its totient is φ = 807905280.

The previous prime is 2065236629. The next prime is 2065236643. The reversal of 2065236640 is 466325602.

It is a junction number, because it is equal to n+sod(n) for n = 2065236596 and 2065236605.

It is not an unprimeable number, because it can be changed into a prime (2065236643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1555657 + ... + 1556983.

It is an arithmetic number, because the mean of its divisors is an integer number (51955344).

Almost surely, 2^2065236640 is an apocalyptic number.

2065236640 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 2065236640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2493856512).

2065236640 is an abundant number, since it is smaller than the sum of its proper divisors (2922476384).

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

2065236640 is a wasteful number, since it uses less digits than its factorization.

2065236640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550 (or 1542 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 2065236640 is about 45444.8747385225. The cubic root of 2065236640 is about 1273.4735832896.

The spelling of 2065236640 in words is "two billion, sixty-five million, two hundred thirty-six thousand, six hundred forty".