3978784293562 has 16 divisors (see below), whose sum is σ = 6484145409000. Its totient is φ = 1820110989312.

The previous prime is 3978784293493. The next prime is 3978784293581. The reversal of 3978784293562 is 2653924878793.

It can be written as a sum of positive squares in 4 ways, for example, as 276927485121 + 3701856808441 = 526239^2 + 1924021^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677121687 + ... + 677127562.

Almost surely, 2^{3978784293562} is an apocalyptic number.

3978784293562 is a deficient number, since it is larger than the sum of its proper divisors (2505361115438).

3978784293562 is a wasteful number, since it uses less digits than its factorization.

3978784293562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354249377.

The product of its digits is 1097349120, while the sum is 73.

The spelling of 3978784293562 in words is "three trillion, nine hundred seventy-eight billion, seven hundred eighty-four million, two hundred ninety-three thousand, five hundred sixty-two".