1578475971049 has 2 divisors, whose sum is σ = 1578475971050. Its totient is φ = 1578475971048.

The previous prime is 1578475971031. The next prime is 1578475971073. The reversal of 1578475971049 is 9401795748751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1410595659225 + 167880311824 = 1187685^2 + 409732^2 .

It is a cyclic number.

It is not a de Polignac number, because 1578475971049 - 2⁹ = 1578475970537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1578475971349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 789237985524 + 789237985525.

It is an arithmetic number, because the mean of its divisors is an integer number (789237985525).

Almost surely, 2^{1578475971049} is an apocalyptic number.

It is an amenable number.

1578475971049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1578475971049 is an equidigital number, since it uses as much as digits as its factorization.

1578475971049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88905600, while the sum is 67.

The spelling of 1578475971049 in words is "one trillion, five hundred seventy-eight billion, four hundred seventy-five million, nine hundred seventy-one thousand, forty-nine".