1928510140489 has 2 divisors, whose sum is σ = 1928510140490. Its totient is φ = 1928510140488.

The previous prime is 1928510140477. The next prime is 1928510140589. The reversal of 1928510140489 is 9840410158291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1445044410000 + 483465730489 = 1202100^2 + 695317^2 .

It is a cyclic number.

It is not a de Polignac number, because 1928510140489 - 2¹⁵ = 1928510107721 is a prime.

It is not a weakly prime, because it can be changed into another prime (1928510140289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 964255070244 + 964255070245.

It is an arithmetic number, because the mean of its divisors is an integer number (964255070245).

Almost surely, 2^{1928510140489} is an apocalyptic number.

It is an amenable number.

1928510140489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1928510140489 is an equidigital number, since it uses as much as digits as its factorization.

1928510140489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 52.

The spelling of 1928510140489 in words is "one trillion, nine hundred twenty-eight billion, five hundred ten million, one hundred forty thousand, four hundred eighty-nine".