133747645061 has 4 divisors (see below), whose sum is σ = 141615153612. Its totient is φ = 125880136512.

The previous prime is 133747644973. The next prime is 133747645063. The reversal of 133747645061 is 160546747331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121654464100 + 12093180961 = 348790^2 + 109969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133747645061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133747644997 and 133747645015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133747645063) 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, 3933754250 + ... + 3933754283.

It is an arithmetic number, because the mean of its divisors is an integer number (35403788403).

Almost surely, 2^133747645061 is an apocalyptic number.

It is an amenable number.

133747645061 is a deficient number, since it is larger than the sum of its proper divisors (7867508551).

133747645061 is an equidigital number, since it uses as much as digits as its factorization.

133747645061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7867508550.

The product of its (nonzero) digits is 1270080, while the sum is 47.

The spelling of 133747645061 in words is "one hundred thirty-three billion, seven hundred forty-seven million, six hundred forty-five thousand, sixty-one".