3778218487696 has 15 divisors (see below), whose sum is σ = 7320313384113. Its totient is φ = 1889105356320.

The previous prime is 3778218487639. The next prime is 3778218487777. The reversal of 3778218487696 is 6967848128773.

The square root of 3778218487696 is 1943764.

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

It can be written as a sum of positive squares in only one way, i.e., 3688074430096 + 90144057600 = 1920436^2 + 300240^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7532086 + ... + 8018026.

Almost surely, 2^{3778218487696} is an apocalyptic number.

3778218487696 is the 1943764-th square number.

It is an amenable number.

3778218487696 is a deficient number, since it is larger than the sum of its proper divisors (3542094896417).

3778218487696 is an frugal number, since it uses more digits than its factorization.

3778218487696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971890 (or 485943 counting only the distinct ones).

The product of its digits is 1365590016, while the sum is 76.

The spelling of 3778218487696 in words is "three trillion, seven hundred seventy-eight billion, two hundred eighteen million, four hundred eighty-seven thousand, six hundred ninety-six".