100643615045 has 4 divisors (see below), whose sum is σ = 120772338060. Its totient is φ = 80514892032.

The previous prime is 100643615021. The next prime is 100643615071. The reversal of 100643615045 is 540516346001.

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 77065091236 + 23578523809 = 277606^2 + 153553^2 .

It is a cyclic number.

It is not a de Polignac number, because 100643615045 - 2³² = 96348647749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100643614996 and 100643615014.

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, 10064361500 + ... + 10064361509.

It is an arithmetic number, because the mean of its divisors is an integer number (30193084515).

Almost surely, 2^100643615045 is an apocalyptic number.

It is an amenable number.

100643615045 is a deficient number, since it is larger than the sum of its proper divisors (20128723015).

100643615045 is an equidigital number, since it uses as much as digits as its factorization.

100643615045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20128723014.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 100643615045 in words is "one hundred billion, six hundred forty-three million, six hundred fifteen thousand, forty-five".