1285693553950 has 24 divisors (see below), whose sum is σ = 2575343089368. Its totient is φ = 474717619680.

The previous prime is 1285693553923. The next prime is 1285693553993. The reversal of 1285693553950 is 593553965821.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 988994392 + ... + 988995691.

It is an arithmetic number, because the mean of its divisors is an integer number (107305962057).

Almost surely, 2^{1285693553950} is an apocalyptic number.

1285693553950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1285693553950 is an abundant number, since it is smaller than the sum of its proper divisors (1289649535418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285693553950 is a wasteful number, since it uses less digits than its factorization.

1285693553950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977990108 (or 1977990103 counting only the distinct ones).

The product of its (nonzero) digits is 43740000, while the sum is 61.

The spelling of 1285693553950 in words is "one trillion, two hundred eighty-five billion, six hundred ninety-three million, five hundred fifty-three thousand, nine hundred fifty".