133521457464 has 24 divisors (see below), whose sum is σ = 361620614160. Its totient is φ = 44507152464.

The previous prime is 133521457463. The next prime is 133521457471. The reversal of 133521457464 is 464754125331.

133521457464 is a `hidden beast` number, since 1 + 3 + 3 + 5 + 2 + 14 + 574 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×133521457464² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133521457463) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 927232272 + ... + 927232415.

It is an arithmetic number, because the mean of its divisors is an integer number (15067525590).

Almost surely, 2^133521457464 is an apocalyptic number.

It is an amenable number.

133521457464 is an abundant number, since it is smaller than the sum of its proper divisors (228099156696).

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

133521457464 is a wasteful number, since it uses less digits than its factorization.

133521457464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854464699 (or 1854464692 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The spelling of 133521457464 in words is "one hundred thirty-three billion, five hundred twenty-one million, four hundred fifty-seven thousand, four hundred sixty-four".