100561045451 has 2 divisors, whose sum is σ = 100561045452. Its totient is φ = 100561045450.

The previous prime is 100561045369. The next prime is 100561045477. The reversal of 100561045451 is 154540165001.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100561045451 is a prime.

It is a super-2 number, since 2×100561045451² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (100561005451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50280522725 + 50280522726.

It is an arithmetic number, because the mean of its divisors is an integer number (50280522726).

Almost surely, 2^100561045451 is an apocalyptic number.

100561045451 is a deficient number, since it is larger than the sum of its proper divisors (1).

100561045451 is an equidigital number, since it uses as much as digits as its factorization.

100561045451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 100561045451 in words is "one hundred billion, five hundred sixty-one million, forty-five thousand, four hundred fifty-one".