100561206545 has 8 divisors (see below), whose sum is σ = 120676617600. Its totient is φ = 80446852080.

The previous prime is 100561206527. The next prime is 100561206563. The reversal of 100561206545 is 545602165001.

It is an interprime number because it is at equal distance from previous prime (100561206527) and next prime (100561206563).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100561206545 - 2⁸ = 100561206289 is a prime.

It is a super-2 number, since 2×100561206545² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37001 + ... + 449990.

It is an arithmetic number, because the mean of its divisors is an integer number (15084577200).

Almost surely, 2^100561206545 is an apocalyptic number.

It is an amenable number.

100561206545 is a deficient number, since it is larger than the sum of its proper divisors (20115411055).

100561206545 is an equidigital number, since it uses as much as digits as its factorization.

100561206545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528295.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 100561206545 in words is "one hundred billion, five hundred sixty-one million, two hundred six thousand, five hundred forty-five".