100505100655 has 16 divisors (see below), whose sum is σ = 126130219200. Its totient is φ = 76736923648.

The previous prime is 100505100653. The next prime is 100505100671. The reversal of 100505100655 is 556001505001.

It is a cyclic number.

It is not a de Polignac number, because 100505100655 - 2¹ = 100505100653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100505100653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 921592 + ... + 1024861.

It is an arithmetic number, because the mean of its divisors is an integer number (7883138700).

Almost surely, 2^100505100655 is an apocalyptic number.

100505100655 is a deficient number, since it is larger than the sum of its proper divisors (25625118545).

100505100655 is a wasteful number, since it uses less digits than its factorization.

100505100655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946930.

The product of its (nonzero) digits is 3750, while the sum is 28.

Adding to 100505100655 its reverse (556001505001), we get a palindrome (656506605656).

The spelling of 100505100655 in words is "one hundred billion, five hundred five million, one hundred thousand, six hundred fifty-five".