1285693553949 has 64 divisors (see below), whose sum is σ = 2047705712640. Its totient is φ = 702012729600.

The previous prime is 1285693553923. The next prime is 1285693553993. The reversal of 1285693553949 is 9493553965821.

It is not a de Polignac number, because 1285693553949 - 2²⁷ = 1285559336221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285693558949) 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 in 63 ways as a sum of consecutive naturals, for example, 68476927 + ... + 68495699.

It is an arithmetic number, because the mean of its divisors is an integer number (31995401760).

Almost surely, 2^{1285693553949} is an apocalyptic number.

It is an amenable number.

1285693553949 is a deficient number, since it is larger than the sum of its proper divisors (762012158691).

1285693553949 is a wasteful number, since it uses less digits than its factorization.

1285693553949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19970.

The product of its digits is 314928000, while the sum is 69.

The spelling of 1285693553949 in words is "one trillion, two hundred eighty-five billion, six hundred ninety-three million, five hundred fifty-three thousand, nine hundred forty-nine".