133611133820 has 48 divisors (see below), whose sum is σ = 297765357120. Its totient is φ = 50186025984.

The previous prime is 133611133811. The next prime is 133611133829. The reversal of 133611133820 is 28331116331.

It is an interprime number because it is at equal distance from previous prime (133611133811) and next prime (133611133829).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133611133829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298319 + ... + 596838.

It is an arithmetic number, because the mean of its divisors is an integer number (6203444940).

Almost surely, 2^133611133820 is an apocalyptic number.

133611133820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133611133820 is an abundant number, since it is smaller than the sum of its proper divisors (164154223300).

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

133611133820 is a wasteful number, since it uses less digits than its factorization.

133611133820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895622 (or 895620 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 133611133820 in words is "one hundred thirty-three billion, six hundred eleven million, one hundred thirty-three thousand, eight hundred twenty".