140545055921 has 2 divisors, whose sum is σ = 140545055922. Its totient is φ = 140545055920.

The previous prime is 140545055909. The next prime is 140545055951. The reversal of 140545055921 is 129550545041.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103272892321 + 37272163600 = 321361^2 + 193060^2 .

It is a cyclic number.

It is not a de Polignac number, because 140545055921 - 2¹⁸ = 140544793777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (140545055951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70272527960 + 70272527961.

It is an arithmetic number, because the mean of its divisors is an integer number (70272527961).

Almost surely, 2^140545055921 is an apocalyptic number.

It is an amenable number.

140545055921 is a deficient number, since it is larger than the sum of its proper divisors (1).

140545055921 is an equidigital number, since it uses as much as digits as its factorization.

140545055921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180000, while the sum is 41.

The spelling of 140545055921 in words is "one hundred forty billion, five hundred forty-five million, fifty-five thousand, nine hundred twenty-one".