2197278511684 has 27 divisors (see below), whose sum is σ = 3869823607167. Its totient is φ = 1091659001544.

The previous prime is 2197278511663. The next prime is 2197278511693. The reversal of 2197278511684 is 4861158727912.

The square root of 2197278511684 is 1482322.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 483234699 + ... + 483239245.

Almost surely, 2^{2197278511684} is an apocalyptic number.

2197278511684 is the 1482322-nd square number.

It is an amenable number.

2197278511684 is a deficient number, since it is larger than the sum of its proper divisors (1672545095483).

2197278511684 is an frugal number, since it uses more digits than its factorization.

2197278511684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9424 (or 4712 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 61.

The spelling of 2197278511684 in words is "two trillion, one hundred ninety-seven billion, two hundred seventy-eight million, five hundred eleven thousand, six hundred eighty-four".