133949697856 has 28 divisors (see below), whose sum is σ = 286253082052. Its totient is φ = 61822937088.

The previous prime is 133949697839. The next prime is 133949697857. The reversal of 133949697856 is 658796949331.

It can be written as a sum of positive squares in 2 ways, for example, as 44261427456 + 89688270400 = 210384^2 + 299480^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133949697857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80497785 + ... + 80499448.

It is an arithmetic number, because the mean of its divisors is an integer number (10223324359).

Almost surely, 2^133949697856 is an apocalyptic number.

133949697856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133949697856 is an abundant number, since it is smaller than the sum of its proper divisors (152303384196).

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

133949697856 is a wasteful number, since it uses less digits than its factorization.

133949697856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160997258 (or 160997248 counting only the distinct ones).

The product of its digits is 264539520, while the sum is 70.

The spelling of 133949697856 in words is "one hundred thirty-three billion, nine hundred forty-nine million, six hundred ninety-seven thousand, eight hundred fifty-six".