1444745921501 has 2 divisors, whose sum is σ = 1444745921502. Its totient is φ = 1444745921500.

The previous prime is 1444745921497. The next prime is 1444745921537. The reversal of 1444745921501 is 1051295474441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1221966641476 + 222779280025 = 1105426^2 + 471995^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444745921501 - 2² = 1444745921497 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1444745921581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722372960750 + 722372960751.

It is an arithmetic number, because the mean of its divisors is an integer number (722372960751).

Almost surely, 2^{1444745921501} is an apocalyptic number.

It is an amenable number.

1444745921501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444745921501 is an equidigital number, since it uses as much as digits as its factorization.

1444745921501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 1444745921501 in words is "one trillion, four hundred forty-four billion, seven hundred forty-five million, nine hundred twenty-one thousand, five hundred one".