2045242640 has 40 divisors (see below), whose sum is σ = 5434503360. Its totient is φ = 701225856.

The previous prime is 2045242621. The next prime is 2045242687. The reversal of 2045242640 is 462425402.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1825550 + ... + 1826669.

It is an arithmetic number, because the mean of its divisors is an integer number (135862584).

Almost surely, 2^2045242640 is an apocalyptic number.

2045242640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2045242640 is an abundant number, since it is smaller than the sum of its proper divisors (3389260720).

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

2045242640 is a wasteful number, since it uses less digits than its factorization.

2045242640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3652239 (or 3652233 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 2045242640 is about 45224.3589230406. The cubic root of 2045242640 is about 1269.3506590223.

The spelling of 2045242640 in words is "two billion, forty-five million, two hundred forty-two thousand, six hundred forty".