111641980249 has 4 divisors (see below), whose sum is σ = 111958246836. Its totient is φ = 111325713664.

The previous prime is 111641980237. The next prime is 111641980277. The reversal of 111641980249 is 942089146111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71203585600 + 40438394649 = 266840^2 + 201093^2 .

It is a cyclic number.

It is not a de Polignac number, because 111641980249 - 2¹⁵ = 111641947481 is a prime.

It is a super-2 number, since 2×111641980249² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111641980199 and 111641980208.

It is not an unprimeable number, because it can be changed into a prime (111641981249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158132764 + ... + 158133469.

It is an arithmetic number, because the mean of its divisors is an integer number (27989561709).

Almost surely, 2^111641980249 is an apocalyptic number.

It is an amenable number.

111641980249 is a deficient number, since it is larger than the sum of its proper divisors (316266587).

111641980249 is an equidigital number, since it uses as much as digits as its factorization.

111641980249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316266586.

The product of its (nonzero) digits is 124416, while the sum is 46.

The spelling of 111641980249 in words is "one hundred eleven billion, six hundred forty-one million, nine hundred eighty thousand, two hundred forty-nine".