100553221646 has 16 divisors (see below), whose sum is σ = 157531989888. Its totient is φ = 48046567800.

The previous prime is 100553221589. The next prime is 100553221667. The reversal of 100553221646 is 646122355001.

It is a super-2 number, since 2×100553221646² (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 in 7 ways as a sum of consecutive naturals, for example, 951620 + ... + 1051991.

It is an arithmetic number, because the mean of its divisors is an integer number (9845749368).

Almost surely, 2^100553221646 is an apocalyptic number.

100553221646 is a deficient number, since it is larger than the sum of its proper divisors (56978768242).

100553221646 is a wasteful number, since it uses less digits than its factorization.

100553221646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004727.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 100553221646 its reverse (646122355001), we get a palindrome (746675576647).

The spelling of 100553221646 in words is "one hundred billion, five hundred fifty-three million, two hundred twenty-one thousand, six hundred forty-six".