133685373634 has 4 divisors (see below), whose sum is σ = 200528060454. Its totient is φ = 66842686816.

The previous prime is 133685373589. The next prime is 133685373637. The reversal of 133685373634 is 436373586331.

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

It can be written as a sum of positive squares in only one way, i.e., 109232233009 + 24453140625 = 330503^2 + 156375^2 .

It is not an unprimeable number, because it can be changed into a prime (133685373637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33421343407 + ... + 33421343410.

Almost surely, 2^133685373634 is an apocalyptic number.

133685373634 is a deficient number, since it is larger than the sum of its proper divisors (66842686820).

133685373634 is an equidigital number, since it uses as much as digits as its factorization.

133685373634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66842686819.

The product of its digits is 9797760, while the sum is 52.

The spelling of 133685373634 in words is "one hundred thirty-three billion, six hundred eighty-five million, three hundred seventy-three thousand, six hundred thirty-four".