100545500945 has 4 divisors (see below), whose sum is σ = 120654601140. Its totient is φ = 80436400752.

The previous prime is 100545500921. The next prime is 100545501031. The reversal of 100545500945 is 549005545001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549005545001 = 1193 ⋅460189057.

It can be written as a sum of positive squares in 2 ways, for example, as 60020590081 + 40524910864 = 244991^2 + 201308^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100545500945 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100545500899 and 100545500908.

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, 10054550090 + ... + 10054550099.

It is an arithmetic number, because the mean of its divisors is an integer number (30163650285).

Almost surely, 2^100545500945 is an apocalyptic number.

It is an amenable number.

100545500945 is a deficient number, since it is larger than the sum of its proper divisors (20109100195).

100545500945 is an equidigital number, since it uses as much as digits as its factorization.

100545500945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20109100194.

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 100545500945 in words is "one hundred billion, five hundred forty-five million, five hundred thousand, nine hundred forty-five".