133645721552 has 20 divisors (see below), whose sum is σ = 295929812256. Its totient is φ = 57276737760.

The previous prime is 133645721537. The next prime is 133645721563. The reversal of 133645721552 is 255127546331.

It is a super-2 number, since 2×133645721552² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 596632574 + ... + 596632797.

Almost surely, 2^133645721552 is an apocalyptic number.

It is an amenable number.

133645721552 is an abundant number, since it is smaller than the sum of its proper divisors (162284090704).

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

133645721552 is a wasteful number, since it uses less digits than its factorization.

133645721552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193265386 (or 1193265380 counting only the distinct ones).

The product of its digits is 756000, while the sum is 44.

The spelling of 133645721552 in words is "one hundred thirty-three billion, six hundred forty-five million, seven hundred twenty-one thousand, five hundred fifty-two".