1118240685961 has 21 divisors (see below), whose sum is σ = 1305035850061. Its totient is φ = 958181120652.

The previous prime is 1118240685949. The next prime is 1118240685971. The reversal of 1118240685961 is 1695860428111.

The square root of 1118240685961 is 1057469.

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

It is not a de Polignac number, because 1118240685961 - 2⁵ = 1118240685929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1118240685899 and 1118240685908.

It is not an unprimeable number, because it can be changed into a prime (1118240685931) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 362710326 + ... + 362713408.

Almost surely, 2^{1118240685961} is an apocalyptic number.

1118240685961 is the 1057469-th square number.

1118240685961 is the 528735-th centered octagonal number.

It is an amenable number.

1118240685961 is a deficient number, since it is larger than the sum of its proper divisors (186795164100).

1118240685961 is an frugal number, since it uses more digits than its factorization.

1118240685961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6208 (or 3090 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 52.

The spelling of 1118240685961 in words is "one trillion, one hundred eighteen billion, two hundred forty million, six hundred eighty-five thousand, nine hundred sixty-one".