133428177998 has 4 divisors (see below), whose sum is σ = 200142267000. Its totient is φ = 66714088998.

The previous prime is 133428177997. The next prime is 133428178003. The reversal of 133428177998 is 899771824331.

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

It is a self number, because there is not a number n which added to its sum of digits gives 133428177998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133428177997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33357044498 + ... + 33357044501.

It is an arithmetic number, because the mean of its divisors is an integer number (50035566750).

Almost surely, 2^133428177998 is an apocalyptic number.

133428177998 is a deficient number, since it is larger than the sum of its proper divisors (66714089002).

133428177998 is an equidigital number, since it uses as much as digits as its factorization.

133428177998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66714089001.

The product of its digits is 18289152, while the sum is 62.

The spelling of 133428177998 in words is "one hundred thirty-three billion, four hundred twenty-eight million, one hundred seventy-seven thousand, nine hundred ninety-eight".