133556761604 has 18 divisors (see below), whose sum is σ = 271883407950. Its totient is φ = 57238612032.

The previous prime is 133556761603. The next prime is 133556761609. The reversal of 133556761604 is 406167655331.

133556761604 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 79501441600 + 54055320004 = 281960^2 + 232498^2 .

It is not an unprimeable number, because it can be changed into a prime (133556761603) 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, 340705829 + ... + 340706220.

It is an arithmetic number, because the mean of its divisors is an integer number (15104633775).

Almost surely, 2^133556761604 is an apocalyptic number.

133556761604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

133556761604 is an abundant number, since it is smaller than the sum of its proper divisors (138326646346).

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

133556761604 is a wasteful number, since it uses less digits than its factorization.

133556761604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681412067 (or 681412058 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 133556761604 in words is "one hundred thirty-three billion, five hundred fifty-six million, seven hundred sixty-one thousand, six hundred four".