2649721100 has 36 divisors (see below), whose sum is σ = 6192197424. Its totient is φ = 978358080.

The previous prime is 2649721091. The next prime is 2649721127. The reversal of 2649721100 is 11279462.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1017824 + ... + 1020423.

It is an arithmetic number, because the mean of its divisors is an integer number (172005484).

Almost surely, 2^2649721100 is an apocalyptic number.

2649721100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2649721100 is an abundant number, since it is smaller than the sum of its proper divisors (3542476324).

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

2649721100 is a wasteful number, since it uses less digits than its factorization.

2649721100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038274 (or 2038267 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 2649721100 is about 51475.4417173860. The cubic root of 2649721100 is about 1383.7789548355.

The spelling of 2649721100 in words is "two billion, six hundred forty-nine million, seven hundred twenty-one thousand, one hundred".