2686196437444 has 63 divisors (see below), whose sum is σ = 5106270299403. Its totient is φ = 1236459156192.

The previous prime is 2686196437429. The next prime is 2686196437471. The reversal of 2686196437444 is 4447346916862.

The square root of 2686196437444 is 1638962.

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

It can be written as a sum of positive squares in 10 ways, for example, as 492716955844 + 2193479481600 = 701938^2 + 1481040^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 7201598842 + ... + 7201599214.

Almost surely, 2^{2686196437444} is an apocalyptic number.

2686196437444 is the 1638962-nd square number.

It is an amenable number.

2686196437444 is a deficient number, since it is larger than the sum of its proper divisors (2420073861959).

2686196437444 is an frugal number, since it uses more digits than its factorization.

2686196437444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828 (or 388 counting only the distinct ones).

The product of its digits is 167215104, while the sum is 64.

Multiplying 2686196437444 by its sum of digits (64), we get a square (171916571996416 = 13111696²).

The spelling of 2686196437444 in words is "two trillion, six hundred eighty-six billion, one hundred ninety-six million, four hundred thirty-seven thousand, four hundred forty-four".