133965451620 has 432 divisors, whose sum is σ = 548612168832. Its totient is φ = 25695221760.

The previous prime is 133965451603. The next prime is 133965451621. The reversal of 133965451620 is 26154569331.

133965451620 is a `hidden beast` number, since 1 + 3 + 3 + 96 + 545 + 16 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (133965451621) 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 143 ways as a sum of consecutive naturals, for example, 2313744 + ... + 2370936.

It is an arithmetic number, because the mean of its divisors is an integer number (1269935576).

Almost surely, 2^133965451620 is an apocalyptic number.

133965451620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133965451620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274306084416).

133965451620 is an abundant number, since it is smaller than the sum of its proper divisors (414646717212).

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

133965451620 is a wasteful number, since it uses less digits than its factorization.

133965451620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57252 (or 57234 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

It can be divided in two parts, 133965 and 451620, that added together give a palindrome (585585).

The spelling of 133965451620 in words is "one hundred thirty-three billion, nine hundred sixty-five million, four hundred fifty-one thousand, six hundred twenty".