111845431489 has 9 divisors (see below), whose sum is σ = 122941584129. Its totient is φ = 101674320660.

The previous prime is 111845431487. The next prime is 111845431501. The reversal of 111845431489 is 984134548111.

The square root of 111845431489 is 334433.

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

It is not a de Polignac number, because 111845431489 - 2¹ = 111845431487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111845431487) 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, 3663562 + ... + 3693964.

Almost surely, 2^111845431489 is an apocalyptic number.

111845431489 is the 334433-rd square number.

111845431489 is the 167217-th centered octagonal number.

It is an amenable number.

111845431489 is a deficient number, since it is larger than the sum of its proper divisors (11096152640).

111845431489 is an frugal number, since it uses more digits than its factorization.

111845431489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60828 (or 30414 counting only the distinct ones).

The product of its digits is 552960, while the sum is 49.

Multiplying 111845431489 by its sum of digits (49), we get a square (5480426142961 = 2341031²).

The spelling of 111845431489 in words is "one hundred eleven billion, eight hundred forty-five million, four hundred thirty-one thousand, four hundred eighty-nine".