1946407248769 has 3 divisors (see below), whose sum is σ = 1946408643907. Its totient is φ = 1946405853632.

The previous prime is 1946407248727. The next prime is 1946407248791. The reversal of 1946407248769 is 9678427046491.

The square root of 1946407248769 is 1395137.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 887335740225 + 1059071508544 = 941985^2 + 1029112^2 .

It is not a de Polignac number, because 1946407248769 - 2³³ = 1937817314177 is a prime.

It is a super-2 number, since 2×1946407248769² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1946407258769) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 697569 + ... + 2092705.

Almost surely, 2^{1946407248769} is an apocalyptic number.

1946407248769 is the 1395137-th square number.

1946407248769 is the 697569-th centered octagonal number.

It is an amenable number.

1946407248769 is a deficient number, since it is larger than the sum of its proper divisors (1395138).

1946407248769 is an frugal number, since it uses more digits than its factorization.

1946407248769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790274 (or 1395137 counting only the distinct ones).

The product of its (nonzero) digits is 146313216, while the sum is 67.

The spelling of 1946407248769 in words is "one trillion, nine hundred forty-six billion, four hundred seven million, two hundred forty-eight thousand, seven hundred sixty-nine".