105521065856 has 16 divisors (see below), whose sum is σ = 210217748640. Its totient is φ = 52760532864.

The previous prime is 105521065849. The next prime is 105521065861. The reversal of 105521065856 is 658560125501.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×105521065856² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412191536 + ... + 412191791.

It is an arithmetic number, because the mean of its divisors is an integer number (13138609290).

Almost surely, 2^105521065856 is an apocalyptic number.

105521065856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

105521065856 is a deficient number, since it is larger than the sum of its proper divisors (104696682784).

105521065856 is an frugal number, since it uses more digits than its factorization.

105521065856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824383341 (or 824383329 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 44.

The spelling of 105521065856 in words is "one hundred five billion, five hundred twenty-one million, sixty-five thousand, eight hundred fifty-six".