2645401128 has 32 divisors (see below), whose sum is σ = 6651741600. Its totient is φ = 876701888.

The previous prime is 2645401123. The next prime is 2645401147. The reversal of 2645401128 is 8211045462.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2645401123) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 314418 + ... + 322721.

It is an arithmetic number, because the mean of its divisors is an integer number (207866925).

Almost surely, 2^2645401128 is an apocalyptic number.

It is an amenable number.

2645401128 is an abundant number, since it is smaller than the sum of its proper divisors (4006340472).

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

2645401128 is a wasteful number, since it uses less digits than its factorization.

2645401128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637321 (or 637317 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 2645401128 is about 51433.4631149799. The cubic root of 2645401128 is about 1383.0265312481.

The spelling of 2645401128 in words is "two billion, six hundred forty-five million, four hundred one thousand, one hundred twenty-eight".