2644289328452 has 6 divisors (see below), whose sum is σ = 4627506324798. Its totient is φ = 1322144664224.

The previous prime is 2644289328427. The next prime is 2644289328463. The reversal of 2644289328452 is 2548239824462.

It can be written as a sum of positive squares in only one way, i.e., 2256292393216 + 387996935236 = 1502096^2 + 622894^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2644289328391 and 2644289328400.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330536166053 + ... + 330536166060.

It is an arithmetic number, because the mean of its divisors is an integer number (771251054133).

Almost surely, 2^{2644289328452} is an apocalyptic number.

It is an amenable number.

2644289328452 is a deficient number, since it is larger than the sum of its proper divisors (1983216996346).

2644289328452 is a wasteful number, since it uses less digits than its factorization.

2644289328452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661072332117 (or 661072332115 counting only the distinct ones).

The product of its digits is 53084160, while the sum is 59.

The spelling of 2644289328452 in words is "two trillion, six hundred forty-four billion, two hundred eighty-nine million, three hundred twenty-eight thousand, four hundred fifty-two".