133661430542 has 4 divisors (see below), whose sum is σ = 200492145816. Its totient is φ = 66830715270.

The previous prime is 133661430517. The next prime is 133661430571. The reversal of 133661430542 is 245034166331.

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

It is a junction number, because it is equal to n+sod(n) for n = 133661430496 and 133661430505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33415357634 + ... + 33415357637.

It is an arithmetic number, because the mean of its divisors is an integer number (50123036454).

Almost surely, 2^133661430542 is an apocalyptic number.

133661430542 is a deficient number, since it is larger than the sum of its proper divisors (66830715274).

133661430542 is an equidigital number, since it uses as much as digits as its factorization.

133661430542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66830715273.

The product of its (nonzero) digits is 155520, while the sum is 38.

Adding to 133661430542 its reverse (245034166331), we get a palindrome (378695596873).

The spelling of 133661430542 in words is "one hundred thirty-three billion, six hundred sixty-one million, four hundred thirty thousand, five hundred forty-two".