1103636392681 has 9 divisors (see below), whose sum is σ = 1134310516101. Its totient is φ = 1073770562592.

The previous prime is 1103636392643. The next prime is 1103636392687. The reversal of 1103636392681 is 1862936363011.

The square root of 1103636392681 is 1050541.

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

It can be written as a sum of positive squares in 4 ways, for example, as 863986981081 + 239649411600 = 929509^2 + 489540^2 .

It is not a de Polignac number, because 1103636392681 - 2⁹ = 1103636392169 is a prime.

It is a super-2 number, since 2×1103636392681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1103636392687) 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, 38855821 + ... + 38884213.

It is an arithmetic number, because the mean of its divisors is an integer number (126034501789).

Almost surely, 2^{1103636392681} is an apocalyptic number.

1103636392681 is the 1050541-st square number.

1103636392681 is the 525271-st centered octagonal number.

It is an amenable number.

1103636392681 is a deficient number, since it is larger than the sum of its proper divisors (30674123420).

1103636392681 is an frugal number, since it uses more digits than its factorization.

1103636392681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56860 (or 28430 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 49.

Multiplying 1103636392681 by its sum of digits (49), we get a square (54078183241369 = 7353787²).

The spelling of 1103636392681 in words is "one trillion, one hundred three billion, six hundred thirty-six million, three hundred ninety-two thousand, six hundred eighty-one".