2545563660 has 24 divisors (see below), whose sum is σ = 7127578416. Its totient is φ = 678816960.

The previous prime is 2545563649. The next prime is 2545563661. The reversal of 2545563660 is 663655452.

It is a super-2 number, since 2×2545563660² = 12959788694225191200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2545563661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21212971 + ... + 21213090.

It is an arithmetic number, because the mean of its divisors is an integer number (296982434).

Almost surely, 2^2545563660 is an apocalyptic number.

2545563660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2545563660 is an abundant number, since it is smaller than the sum of its proper divisors (4582014756).

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

2545563660 is a wasteful number, since it uses less digits than its factorization.

2545563660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42426073 (or 42426071 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 42.

The square root of 2545563660 is about 50453.5792585620. The cubic root of 2545563660 is about 1365.4044716380.

The spelling of 2545563660 in words is "two billion, five hundred forty-five million, five hundred sixty-three thousand, six hundred sixty".