2649540660 has 96 divisors (see below), whose sum is σ = 8336805120. Its totient is φ = 623834112.

The previous prime is 2649540653. The next prime is 2649540679. The reversal of 2649540660 is 660459462.

2649540660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55905 + ... + 91784.

It is an arithmetic number, because the mean of its divisors is an integer number (86841720).

Almost surely, 2^2649540660 is an apocalyptic number.

2649540660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2649540660 is an abundant number, since it is smaller than the sum of its proper divisors (5687264460).

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

2649540660 is a wasteful number, since it uses less digits than its factorization.

2649540660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147737 (or 147735 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 2649540660 is about 51473.6890071034. The cubic root of 2649540660 is about 1383.7475433859.

The spelling of 2649540660 in words is "two billion, six hundred forty-nine million, five hundred forty thousand, six hundred sixty".