133887401288861 has 4 divisors (see below), whose sum is σ = 146058983224224. Its totient is φ = 121715819353500.

The previous prime is 133887401288833. The next prime is 133887401288869. The reversal of 133887401288861 is 168882104788331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133887401288861 - 2¹⁰ = 133887401287837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133887401288791 and 133887401288800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133887401288869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6085790967665 + ... + 6085790967686.

It is an arithmetic number, because the mean of its divisors is an integer number (36514745806056).

Almost surely, 2^{133887401288861} is an apocalyptic number.

133887401288861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133887401288861 is a deficient number, since it is larger than the sum of its proper divisors (12171581935363).

133887401288861 is a wasteful number, since it uses less digits than its factorization.

133887401288861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12171581935362.

The product of its (nonzero) digits is 99090432, while the sum is 68.

The spelling of 133887401288861 in words is "one hundred thirty-three trillion, eight hundred eighty-seven billion, four hundred one million, two hundred eighty-eight thousand, eight hundred sixty-one".