105557791778 has 8 divisors (see below), whose sum is σ = 158338506780. Its totient is φ = 52778289520.

The previous prime is 105557791747. The next prime is 105557791819. The reversal of 105557791778 is 877197755501.

It can be written as a sum of positive squares in 2 ways, for example, as 70359154009 + 35198637769 = 265253^2 + 187613^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×105557791778² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105557791778.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39833 + ... + 461196.

Almost surely, 2^105557791778 is an apocalyptic number.

105557791778 is a deficient number, since it is larger than the sum of its proper divisors (52780715002).

105557791778 is a wasteful number, since it uses less digits than its factorization.

105557791778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606372.

The product of its (nonzero) digits is 21609000, while the sum is 62.

The spelling of 105557791778 in words is "one hundred five billion, five hundred fifty-seven million, seven hundred ninety-one thousand, seven hundred seventy-eight".