103598910581 has 4 divisors (see below), whose sum is σ = 103599577164. Its totient is φ = 103598244000.

The previous prime is 103598910563. The next prime is 103598910637. The reversal of 103598910581 is 185019895301.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 185019895301 = 17 ⋅10883523253.

It can be written as a sum of positive squares in 2 ways, for example, as 75388684900 + 28210225681 = 274570^2 + 167959^2 .

It is a cyclic number.

It is not a de Polignac number, because 103598910581 - 2¹⁴ = 103598894197 is a prime.

It is a super-3 number, since 3×103598910581³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103598910521) 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, 36881 + ... + 456681.

It is an arithmetic number, because the mean of its divisors is an integer number (25899894291).

Almost surely, 2^103598910581 is an apocalyptic number.

It is an amenable number.

103598910581 is a deficient number, since it is larger than the sum of its proper divisors (666583).

103598910581 is an equidigital number, since it uses as much as digits as its factorization.

103598910581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666582.

The product of its (nonzero) digits is 388800, while the sum is 50.

The spelling of 103598910581 in words is "one hundred three billion, five hundred ninety-eight million, nine hundred ten thousand, five hundred eighty-one".