2506781672 has 16 divisors (see below), whose sum is σ = 4827249060. Its totient is φ = 1219515264.

The previous prime is 2506781671. The next prime is 2506781681. The reversal of 2506781672 is 2761876052.

It can be written as a sum of positive squares in 2 ways, for example, as 2451636196 + 55145476 = 49514^2 + 7426^2 .

It is not an unprimeable number, because it can be changed into a prime (2506781671) 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 3 ways as a sum of consecutive naturals, for example, 4234133 + ... + 4234724.

Almost surely, 2^2506781672 is an apocalyptic number.

It is an amenable number.

2506781672 is a deficient number, since it is larger than the sum of its proper divisors (2320467388).

2506781672 is a wasteful number, since it uses less digits than its factorization.

2506781672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8468900 (or 8468896 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 2506781672 is about 50067.7707911986. The cubic root of 2506781672 is about 1358.4349196167.

The spelling of 2506781672 in words is "two billion, five hundred six million, seven hundred eighty-one thousand, six hundred seventy-two".