2649126128 has 20 divisors (see below), whose sum is σ = 5599289688. Its totient is φ = 1204148160.

The previous prime is 2649126121. The next prime is 2649126143. The reversal of 2649126128 is 8216219462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2649126121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7525751 + ... + 7526102.

Almost surely, 2^2649126128 is an apocalyptic number.

It is an amenable number.

2649126128 is an abundant number, since it is smaller than the sum of its proper divisors (2950163560).

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

2649126128 is a wasteful number, since it uses less digits than its factorization.

2649126128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15051872 (or 15051866 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 2649126128 is about 51469.6622098883. The cubic root of 2649126128 is about 1383.6753752094.

The spelling of 2649126128 in words is "two billion, six hundred forty-nine million, one hundred twenty-six thousand, one hundred twenty-eight".