105561243351 has 24 divisors (see below), whose sum is σ = 162046843920. Its totient is φ = 65988254976.

The previous prime is 105561243343. The next prime is 105561243353. The reversal of 105561243351 is 153342165501.

105561243351 is a `hidden beast` number, since 1 + 0 + 5 + 5 + 61 + 243 + 351 = 666.

It is not a de Polignac number, because 105561243351 - 2³ = 105561243343 is a prime.

It is a super-2 number, since 2×105561243351² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105561243353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1241265 + ... + 1323578.

It is an arithmetic number, because the mean of its divisors is an integer number (6751951830).

Almost surely, 2^105561243351 is an apocalyptic number.

105561243351 is a deficient number, since it is larger than the sum of its proper divisors (56485600569).

105561243351 is a wasteful number, since it uses less digits than its factorization.

105561243351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565135 (or 2565132 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 105561243351 in words is "one hundred five billion, five hundred sixty-one million, two hundred forty-three thousand, three hundred fifty-one".