113781779144869 has 6 divisors (see below), whose sum is σ = 125065922531270. Its totient is φ = 103437981040680.

The previous prime is 113781779144863. The next prime is 113781779144951. The reversal of 113781779144869 is 968441977187311.

It can be written as a sum of positive squares in only one way, i.e., 110631374241025 + 3150404903844 = 10518145^2 + 1774938^2 .

It is not a de Polignac number, because 113781779144869 - 2³⁹ = 113232023330981 is a prime.

It is a super-2 number, since 2×113781779144869² (a number of 29 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 = 113781779144795 and 113781779144804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113781779144863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 470172640974 + ... + 470172641215.

Almost surely, 2^{113781779144869} is an apocalyptic number.

It is an amenable number.

113781779144869 is a deficient number, since it is larger than the sum of its proper divisors (11284143386401).

113781779144869 is an equidigital number, since it uses as much as digits as its factorization.

113781779144869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940345282211 (or 940345282200 counting only the distinct ones).

The product of its digits is 512096256, while the sum is 76.

The spelling of 113781779144869 in words is "one hundred thirteen trillion, seven hundred eighty-one billion, seven hundred seventy-nine million, one hundred forty-four thousand, eight hundred sixty-nine".