133235566440 has 32 divisors (see below), whose sum is σ = 399706699680. Its totient is φ = 35529484352.

The previous prime is 133235566423. The next prime is 133235566441. The reversal of 133235566440 is 44665532331.

It is a junction number, because it is equal to n+sod(n) for n = 133235566392 and 133235566401.

It is not an unprimeable number, because it can be changed into a prime (133235566441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555148074 + ... + 555148313.

It is an arithmetic number, because the mean of its divisors is an integer number (12490834365).

Almost surely, 2^133235566440 is an apocalyptic number.

133235566440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133235566440 is an abundant number, since it is smaller than the sum of its proper divisors (266471133240).

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

133235566440 is a wasteful number, since it uses less digits than its factorization.

133235566440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110296401 (or 1110296397 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 42.

The spelling of 133235566440 in words is "one hundred thirty-three billion, two hundred thirty-five million, five hundred sixty-six thousand, four hundred forty".