2778815652484 has 81 divisors (see below), whose sum is σ = 5169606480493. Its totient is φ = 1306910752000.

The previous prime is 2778815652469. The next prime is 2778815652497. The reversal of 2778815652484 is 4842565188772.

The square root of 2778815652484 is 1666978.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 1758069150084 + 1020746502400 = 1325922^2 + 1010320^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3964073334 + ... + 3964074034.

Almost surely, 2^{2778815652484} is an apocalyptic number.

2778815652484 is the 1666978-th square number.

It is an amenable number.

2778815652484 is a deficient number, since it is larger than the sum of its proper divisors (2390790828009).

2778815652484 is an frugal number, since it uses more digits than its factorization.

2778815652484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546 (or 773 counting only the distinct ones).

The product of its digits is 240844800, while the sum is 67.

The spelling of 2778815652484 in words is "two trillion, seven hundred seventy-eight billion, eight hundred fifteen million, six hundred fifty-two thousand, four hundred eighty-four".