2045255640 has 32 divisors (see below), whose sum is σ = 6135767280. Its totient is φ = 545401472.

The previous prime is 2045255633. The next prime is 2045255671. The reversal of 2045255640 is 465525402.

It is a congruent number.

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, 8521779 + ... + 8522018.

Almost surely, 2^2045255640 is an apocalyptic number.

2045255640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2045255640 is an abundant number, since it is smaller than the sum of its proper divisors (4090511640).

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

2045255640 is a wasteful number, since it uses less digits than its factorization.

2045255640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17043811 (or 17043807 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

The square root of 2045255640 is about 45224.5026506649. The cubic root of 2045255640 is about 1269.3533484381.

The spelling of 2045255640 in words is "two billion, forty-five million, two hundred fifty-five thousand, six hundred forty".