2545659680 has 24 divisors (see below), whose sum is σ = 6014121372. Its totient is φ = 1018263808.

The previous prime is 2545659661. The next prime is 2545659709. The reversal of 2545659680 is 869565452.

It can be written as a sum of positive squares in 2 ways, for example, as 2542983184 + 2676496 = 50428^2 + 1636^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7955027 + ... + 7955346.

Almost surely, 2^2545659680 is an apocalyptic number.

2545659680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2545659680 is an abundant number, since it is smaller than the sum of its proper divisors (3468461692).

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

2545659680 is a wasteful number, since it uses less digits than its factorization.

2545659680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15910388 (or 15910380 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 50.

The square root of 2545659680 is about 50454.5308173607. The cubic root of 2545659680 is about 1365.4216393470.

The spelling of 2545659680 in words is "two billion, five hundred forty-five million, six hundred fifty-nine thousand, six hundred eighty".