133391111620 has 24 divisors (see below), whose sum is σ = 301669129944. Its totient is φ = 49252102656.

The previous prime is 133391111537. The next prime is 133391111647. The reversal of 133391111620 is 26111193331.

It can be written as a sum of positive squares in 4 ways, for example, as 31544601664 + 101846509956 = 177608^2 + 319134^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256521109 + ... + 256521628.

It is an arithmetic number, because the mean of its divisors is an integer number (12569547081).

Almost surely, 2^133391111620 is an apocalyptic number.

133391111620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133391111620 is an abundant number, since it is smaller than the sum of its proper divisors (168278018324).

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

133391111620 is a wasteful number, since it uses less digits than its factorization.

133391111620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513042759 (or 513042757 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The spelling of 133391111620 in words is "one hundred thirty-three billion, three hundred ninety-one million, one hundred eleven thousand, six hundred twenty".