100545500491 has 2 divisors, whose sum is σ = 100545500492. Its totient is φ = 100545500490.

The previous prime is 100545500459. The next prime is 100545500551. The reversal of 100545500491 is 194005545001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100545500491 - 2⁵ = 100545500459 is a prime.

It is not a weakly prime, because it can be changed into another prime (100545500401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50272750245 + 50272750246.

It is an arithmetic number, because the mean of its divisors is an integer number (50272750246).

Almost surely, 2^100545500491 is an apocalyptic number.

100545500491 is a deficient number, since it is larger than the sum of its proper divisors (1).

100545500491 is an equidigital number, since it uses as much as digits as its factorization.

100545500491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 100545500491 in words is "one hundred billion, five hundred forty-five million, five hundred thousand, four hundred ninety-one".