133781517728 has 24 divisors (see below), whose sum is σ = 277244593920. Its totient is φ = 63370192320.

The previous prime is 133781517703. The next prime is 133781517787. The reversal of 133781517728 is 827715187331.

It is a self number, because there is not a number n which added to its sum of digits gives 133781517728.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110017088 + ... + 110018303.

It is an arithmetic number, because the mean of its divisors is an integer number (11551858080).

Almost surely, 2^133781517728 is an apocalyptic number.

It is an amenable number.

133781517728 is an abundant number, since it is smaller than the sum of its proper divisors (143463076192).

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

133781517728 is a wasteful number, since it uses less digits than its factorization.

133781517728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220035420 (or 220035412 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 53.

The spelling of 133781517728 in words is "one hundred thirty-three billion, seven hundred eighty-one million, five hundred seventeen thousand, seven hundred twenty-eight".