2615781328 has 10 divisors (see below), whose sum is σ = 5068076354. Its totient is φ = 1307890656.

The previous prime is 2615781323. The next prime is 2615781359. The reversal of 2615781328 is 8231875162.

It can be written as a sum of positive squares in only one way, i.e., 2404137024 + 211644304 = 49032^2 + 14548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2615781323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81743151 + ... + 81743182.

Almost surely, 2^2615781328 is an apocalyptic number.

It is an amenable number.

2615781328 is a deficient number, since it is larger than the sum of its proper divisors (2452295026).

2615781328 is a wasteful number, since it uses less digits than its factorization.

2615781328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163486341 (or 163486335 counting only the distinct ones).

The product of its digits is 161280, while the sum is 43.

The square root of 2615781328 is about 51144.7096775414. The cubic root of 2615781328 is about 1377.8453613011.

The spelling of 2615781328 in words is "two billion, six hundred fifteen million, seven hundred eighty-one thousand, three hundred twenty-eight".