1285729605979 has 48 divisors (see below), whose sum is σ = 1597270379520. Its totient is φ = 1013362721280.

The previous prime is 1285729605971. The next prime is 1285729605989. The reversal of 1285729605979 is 9795069275821.

It is not a de Polignac number, because 1285729605979 - 2³ = 1285729605971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285729605971) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 594968659 + ... + 594970819.

It is an arithmetic number, because the mean of its divisors is an integer number (33276466240).

Almost surely, 2^{1285729605979} is an apocalyptic number.

1285729605979 is a deficient number, since it is larger than the sum of its proper divisors (311540773541).

1285729605979 is a wasteful number, since it uses less digits than its factorization.

1285729605979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3900 (or 3887 counting only the distinct ones).

The product of its (nonzero) digits is 171460800, while the sum is 70.

The spelling of 1285729605979 in words is "one trillion, two hundred eighty-five billion, seven hundred twenty-nine million, six hundred five thousand, nine hundred seventy-nine".