133061678781 has 4 divisors (see below), whose sum is σ = 177415571712. Its totient is φ = 88707785852.

The previous prime is 133061678699. The next prime is 133061678791. The reversal of 133061678781 is 187876160331.

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 133061678781 - 2³⁵ = 98701940413 is a prime.

It is a super-2 number, since 2×133061678781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133061678791) 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, 22176946461 + ... + 22176946466.

It is an arithmetic number, because the mean of its divisors is an integer number (44353892928).

Almost surely, 2^133061678781 is an apocalyptic number.

It is an amenable number.

133061678781 is a deficient number, since it is larger than the sum of its proper divisors (44353892931).

133061678781 is an equidigital number, since it uses as much as digits as its factorization.

133061678781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44353892930.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 133061678781 in words is "one hundred thirty-three billion, sixty-one million, six hundred seventy-eight thousand, seven hundred eighty-one".