133456788891 has 16 divisors (see below), whose sum is σ = 197719480320. Its totient is φ = 88968619080.

The previous prime is 133456788889. The next prime is 133456788961. The reversal of 133456788891 is 198887654331.

133456788891 is a `hidden beast` number, since 1 + 33 + 456 + 78 + 8 + 89 + 1 = 666.

It is not a de Polignac number, because 133456788891 - 2¹ = 133456788889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133456788841) 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, 1538446 + ... + 1622876.

It is an arithmetic number, because the mean of its divisors is an integer number (12357467520).

Almost surely, 2^133456788891 is an apocalyptic number.

133456788891 is a deficient number, since it is larger than the sum of its proper divisors (64262691429).

133456788891 is an equidigital number, since it uses as much as digits as its factorization.

133456788891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142983 (or 142977 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 133456788891 in words is "one hundred thirty-three billion, four hundred fifty-six million, seven hundred eighty-eight thousand, eight hundred ninety-one".