105071221515678 has 32 divisors (see below), whose sum is σ = 229249820322432. Its totient is φ = 31839275368800.

The previous prime is 105071221515677. The next prime is 105071221515713. The reversal of 105071221515678 is 876515122170501.

It is a super-2 number, since 2×105071221515678² (a number of 29 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 105071221515678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105071221515677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7874193 + ... + 16496828.

It is an arithmetic number, because the mean of its divisors is an integer number (7164056885076).

Almost surely, 2^{105071221515678} is an apocalyptic number.

105071221515678 is an abundant number, since it is smaller than the sum of its proper divisors (124178598806754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

105071221515678 is a wasteful number, since it uses less digits than its factorization.

105071221515678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24436360.

The product of its (nonzero) digits is 1176000, while the sum is 51.

The spelling of 105071221515678 in words is "one hundred five trillion, seventy-one billion, two hundred twenty-one million, five hundred fifteen thousand, six hundred seventy-eight".