133438261554 has 48 divisors (see below), whose sum is σ = 312658819200. Its totient is φ = 40886119008.

The previous prime is 133438261553. The next prime is 133438261577. The reversal of 133438261554 is 455162834331.

133438261554 is a `hidden beast` number, since 1 + 3 + 3 + 4 + 38 + 2 + 61 + 554 = 666.

It is not an unprimeable number, because it can be changed into a prime (133438261553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1137064 + ... + 1248915.

It is an arithmetic number, because the mean of its divisors is an integer number (6513725400).

Almost surely, 2^133438261554 is an apocalyptic number.

133438261554 is an abundant number, since it is smaller than the sum of its proper divisors (179220557646).

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

133438261554 is a wasteful number, since it uses less digits than its factorization.

133438261554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386239 (or 2386236 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The spelling of 133438261554 in words is "one hundred thirty-three billion, four hundred thirty-eight million, two hundred sixty-one thousand, five hundred fifty-four".