100505516665556 has 6 divisors (see below), whose sum is σ = 175884654164730. Its totient is φ = 50252758332776.

The previous prime is 100505516665529. The next prime is 100505516665621. The reversal of 100505516665556 is 655566615505001.

It can be written as a sum of positive squares in only one way, i.e., 78732187549456 + 21773329116100 = 8873116^2 + 4666190^2 .

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, 12563189583191 + ... + 12563189583198.

It is an arithmetic number, because the mean of its divisors is an integer number (29314109027455).

Almost surely, 2^{100505516665556} is an apocalyptic number.

It is an amenable number.

100505516665556 is a deficient number, since it is larger than the sum of its proper divisors (75379137499174).

100505516665556 is a wasteful number, since it uses less digits than its factorization.

100505516665556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25126379166393 (or 25126379166391 counting only the distinct ones).

The product of its (nonzero) digits is 20250000, while the sum is 56.

The spelling of 100505516665556 in words is "one hundred trillion, five hundred five billion, five hundred sixteen million, six hundred sixty-five thousand, five hundred fifty-six".