100145055545 has 4 divisors (see below), whose sum is σ = 120174066660. Its totient is φ = 80116044432.

The previous prime is 100145055511. The next prime is 100145055587. The reversal of 100145055545 is 545550541001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545550541001 = 59 ⋅9246619339.

It can be written as a sum of positive squares in 2 ways, for example, as 52398872464 + 47746183081 = 228908^2 + 218509^2 .

It is a cyclic number.

It is not a de Polignac number, because 100145055545 - 2²⁴ = 100128278329 is a prime.

It is a super-2 number, since 2×100145055545² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10014505550 + ... + 10014505559.

It is an arithmetic number, because the mean of its divisors is an integer number (30043516665).

Almost surely, 2^100145055545 is an apocalyptic number.

It is an amenable number.

100145055545 is a deficient number, since it is larger than the sum of its proper divisors (20029011115).

100145055545 is an equidigital number, since it uses as much as digits as its factorization.

100145055545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20029011114.

The product of its (nonzero) digits is 50000, while the sum is 35.

Adding to 100145055545 its reverse (545550541001), we get a palindrome (645695596546).

The spelling of 100145055545 in words is "one hundred billion, one hundred forty-five million, fifty-five thousand, five hundred forty-five".