133464278691 has 32 divisors (see below), whose sum is σ = 209767406400. Its totient is φ = 83577623040.

The previous prime is 133464278677. The next prime is 133464278711. The reversal of 133464278691 is 196872464331.

133464278691 is a `hidden beast` number, since 13 + 3 + 46 + 427 + 86 + 91 = 666.

It is not a de Polignac number, because 133464278691 - 2⁵ = 133464278659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133464278611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52000 + ... + 519261.

It is an arithmetic number, because the mean of its divisors is an integer number (6555231450).

Almost surely, 2^133464278691 is an apocalyptic number.

133464278691 is a deficient number, since it is larger than the sum of its proper divisors (76303127709).

133464278691 is a wasteful number, since it uses less digits than its factorization.

133464278691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571796 (or 571790 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The spelling of 133464278691 in words is "one hundred thirty-three billion, four hundred sixty-four million, two hundred seventy-eight thousand, six hundred ninety-one".