105691091554 has 8 divisors (see below), whose sum is σ = 160171035948. Its totient is φ = 52300746240.

The previous prime is 105691091543. The next prime is 105691091621. The reversal of 105691091554 is 455190196501.

It can be written as a sum of positive squares in 2 ways, for example, as 98014703329 + 7676388225 = 313073^2 + 87615^2 .

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

It is a super-2 number, since 2×105691091554² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272399527 + ... + 272399914.

Almost surely, 2^105691091554 is an apocalyptic number.

105691091554 is a deficient number, since it is larger than the sum of its proper divisors (54479944394).

105691091554 is an equidigital number, since it uses as much as digits as its factorization.

105691091554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544799540.

The product of its (nonzero) digits is 243000, while the sum is 46.

The spelling of 105691091554 in words is "one hundred five billion, six hundred ninety-one million, ninety-one thousand, five hundred fifty-four".