100505091445 has 64 divisors (see below), whose sum is σ = 139415592960. Its totient is φ = 68789260800.

The previous prime is 100505091433. The next prime is 100505091457. The reversal of 100505091445 is 544190505001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (100505091433) and next prime (100505091457).

It is not a de Polignac number, because 100505091445 - 2¹³ = 100505083253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100505091445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 192907785 + ... + 192908305.

It is an arithmetic number, because the mean of its divisors is an integer number (2178368640).

Almost surely, 2^100505091445 is an apocalyptic number.

It is an amenable number.

100505091445 is a deficient number, since it is larger than the sum of its proper divisors (38910501515).

100505091445 is a wasteful number, since it uses less digits than its factorization.

100505091445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426.

The product of its (nonzero) digits is 18000, while the sum is 34.

Adding to 100505091445 its reverse (544190505001), we get a palindrome (644695596446).

The spelling of 100505091445 in words is "one hundred billion, five hundred five million, ninety-one thousand, four hundred forty-five".