2188263401284 has 27 divisors (see below), whose sum is σ = 3912921061693. Its totient is φ = 1070784255968.

The previous prime is 2188263401281. The next prime is 2188263401329. The reversal of 2188263401284 is 4821043628812.

The square root of 2188263401284 is 1479278.

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., 1992078188100 + 196185213184 = 1411410^2 + 442928^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2188263401281) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 139044264 + ... + 139060000.

Almost surely, 2^{2188263401284} is an apocalyptic number.

2188263401284 is the 1479278-th square number.

It is an amenable number.

2188263401284 is a deficient number, since it is larger than the sum of its proper divisors (1724657660409).

2188263401284 is an frugal number, since it uses more digits than its factorization.

2188263401284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31572 (or 15786 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 49.

Multiplying 2188263401284 by its sum of digits (49), we get a square (107224906662916 = 10354946²).

The spelling of 2188263401284 in words is "two trillion, one hundred eighty-eight billion, two hundred sixty-three million, four hundred one thousand, two hundred eighty-four".