1009545318421 has 2 divisors, whose sum is σ = 1009545318422. Its totient is φ = 1009545318420.

The previous prime is 1009545318407. The next prime is 1009545318449. The reversal of 1009545318421 is 1248135459001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 918887119396 + 90658199025 = 958586^2 + 301095^2 .

It is a cyclic number.

It is not a de Polignac number, because 1009545318421 - 2⁵ = 1009545318389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1009545318401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504772659210 + 504772659211.

It is an arithmetic number, because the mean of its divisors is an integer number (504772659211).

Almost surely, 2^{1009545318421} is an apocalyptic number.

It is an amenable number.

1009545318421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009545318421 is an equidigital number, since it uses as much as digits as its factorization.

1009545318421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 1009545318421 in words is "one trillion, nine billion, five hundred forty-five million, three hundred eighteen thousand, four hundred twenty-one".