1579490078021 has 2 divisors, whose sum is σ = 1579490078022. Its totient is φ = 1579490078020.

The previous prime is 1579490077951. The next prime is 1579490078053. The reversal of 1579490078021 is 1208700949751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1090539515521 + 488950562500 = 1044289^2 + 699250^2 .

It is a cyclic number.

It is not a de Polignac number, because 1579490078021 - 2³⁸ = 1304612171077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1579490078821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 789745039010 + 789745039011.

It is an arithmetic number, because the mean of its divisors is an integer number (789745039011).

Almost surely, 2^{1579490078021} is an apocalyptic number.

It is an amenable number.

1579490078021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1579490078021 is an equidigital number, since it uses as much as digits as its factorization.

1579490078021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The spelling of 1579490078021 in words is "one trillion, five hundred seventy-nine billion, four hundred ninety million, seventy-eight thousand, twenty-one".