133645236505 has 16 divisors (see below), whose sum is σ = 174960886464. Its totient is φ = 97192578880.

The previous prime is 133645236469. The next prime is 133645236521. The reversal of 133645236505 is 505632546331.

It is not a de Polignac number, because 133645236505 - 2⁷ = 133645236377 is a prime.

It is a super-2 number, since 2×133645236505² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2470962 + ... + 2524468.

It is an arithmetic number, because the mean of its divisors is an integer number (10935055404).

Almost surely, 2^133645236505 is an apocalyptic number.

It is an amenable number.

133645236505 is a deficient number, since it is larger than the sum of its proper divisors (41315649959).

133645236505 is a wasteful number, since it uses less digits than its factorization.

133645236505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98936.

The product of its (nonzero) digits is 972000, while the sum is 43.

The spelling of 133645236505 in words is "one hundred thirty-three billion, six hundred forty-five million, two hundred thirty-six thousand, five hundred five".