100265430565 has 4 divisors (see below), whose sum is σ = 120318516684. Its totient is φ = 80212344448.

The previous prime is 100265430553. The next prime is 100265430623. The reversal of 100265430565 is 565034562001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28212913089 + 72052517476 = 167967^2 + 268426^2 .

It is a cyclic number.

It is not a de Polignac number, because 100265430565 - 2⁷ = 100265430437 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 10026543052 + ... + 10026543061.

It is an arithmetic number, because the mean of its divisors is an integer number (30079629171).

Almost surely, 2^100265430565 is an apocalyptic number.

It is an amenable number.

100265430565 is a deficient number, since it is larger than the sum of its proper divisors (20053086119).

100265430565 is an equidigital number, since it uses as much as digits as its factorization.

100265430565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20053086118.

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 100265430565 its reverse (565034562001), we get a palindrome (665299992566).

The spelling of 100265430565 in words is "one hundred billion, two hundred sixty-five million, four hundred thirty thousand, five hundred sixty-five".