2485655640 has 256 divisors, whose sum is σ = 9212313600. Its totient is φ = 592012800.

The previous prime is 2485655617. The next prime is 2485655657. The reversal of 2485655640 is 465565842.

2485655640 is a `hidden beast` number, since 2 + 4 + 8 + 56 + 556 + 40 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 432385 + ... + 438095.

It is an arithmetic number, because the mean of its divisors is an integer number (35985600).

Almost surely, 2^2485655640 is an apocalyptic number.

2485655640 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 2485655640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4606156800).

2485655640 is an abundant number, since it is smaller than the sum of its proper divisors (6726657960).

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

2485655640 is a wasteful number, since it uses less digits than its factorization.

2485655640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5775 (or 5765 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

The square root of 2485655640 is about 49856.3500469098. The cubic root of 2485655640 is about 1354.6080555535.

The spelling of 2485655640 in words is "two billion, four hundred eighty-five million, six hundred fifty-five thousand, six hundred forty".