1721576427139 has 2 divisors, whose sum is σ = 1721576427140. Its totient is φ = 1721576427138.

The previous prime is 1721576426879. The next prime is 1721576427157. The reversal of 1721576427139 is 9317246751271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1721576427139 - 2¹⁵ = 1721576394371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1721576427139.

It is not a weakly prime, because it can be changed into another prime (1721576467139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860788213569 + 860788213570.

It is an arithmetic number, because the mean of its divisors is an integer number (860788213570).

Almost surely, 2^{1721576427139} is an apocalyptic number.

1721576427139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1721576427139 is an equidigital number, since it uses as much as digits as its factorization.

1721576427139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4445280, while the sum is 55.

The spelling of 1721576427139 in words is "one trillion, seven hundred twenty-one billion, five hundred seventy-six million, four hundred twenty-seven thousand, one hundred thirty-nine".