133581910819 has 16 divisors (see below), whose sum is σ = 153237966336. Its totient is φ = 114069484800.

The previous prime is 133581910789. The next prime is 133581910843. The reversal of 133581910819 is 918019185331.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133581910819 is a prime.

It is a super-2 number, since 2×133581910819² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133581910859) 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, 4310259 + ... + 4341139.

It is an arithmetic number, because the mean of its divisors is an integer number (9577372896).

Almost surely, 2^133581910819 is an apocalyptic number.

133581910819 is a deficient number, since it is larger than the sum of its proper divisors (19656055517).

133581910819 is a wasteful number, since it uses less digits than its factorization.

133581910819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33186.

The product of its (nonzero) digits is 233280, while the sum is 49.

The spelling of 133581910819 in words is "one hundred thirty-three billion, five hundred eighty-one million, nine hundred ten thousand, eight hundred nineteen".