103631776561 has 4 divisors (see below), whose sum is σ = 104084317300. Its totient is φ = 103179235824.

The previous prime is 103631776553. The next prime is 103631776579. The reversal of 103631776561 is 165677136301.

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 72180882225 + 31450894336 = 268665^2 + 177344^2 .

It is a cyclic number.

It is not a de Polignac number, because 103631776561 - 2³ = 103631776553 is a prime.

It is a super-3 number, since 3×103631776561³ (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 not an unprimeable number, because it can be changed into a prime (103631776541) 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, 226270026 + ... + 226270483.

It is an arithmetic number, because the mean of its divisors is an integer number (26021079325).

Almost surely, 2^103631776561 is an apocalyptic number.

It is an amenable number.

103631776561 is a deficient number, since it is larger than the sum of its proper divisors (452540739).

103631776561 is an equidigital number, since it uses as much as digits as its factorization.

103631776561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452540738.

The product of its (nonzero) digits is 476280, while the sum is 46.

The spelling of 103631776561 in words is "one hundred three billion, six hundred thirty-one million, seven hundred seventy-six thousand, five hundred sixty-one".