1111879564849 has 3 divisors (see below), whose sum is σ = 1111880619307. Its totient is φ = 1111878510392.

The previous prime is 1111879564823. The next prime is 1111879564889. The reversal of 1111879564849 is 9484659781111.

The square root of 1111879564849 is 1054457.

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., 1020211103025 + 91668461824 = 1010055^2 + 302768^2 .

It is not a de Polignac number, because 1111879564849 - 2⁷ = 1111879564721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111879564819) 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, 527229 + ... + 1581685.

Almost surely, 2^{1111879564849} is an apocalyptic number.

1111879564849 is the 1054457-th square number.

1111879564849 is the 527229-th centered octagonal number.

It is an amenable number.

1111879564849 is a deficient number, since it is larger than the sum of its proper divisors (1054458).

1111879564849 is an frugal number, since it uses more digits than its factorization.

1111879564849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108914 (or 1054457 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 64.

Multiplying 1111879564849 by its sum of digits (64), we get a square (71160292150336 = 8435656²).

The spelling of 1111879564849 in words is "one trillion, one hundred eleven billion, eight hundred seventy-nine million, five hundred sixty-four thousand, eight hundred forty-nine".