133165426505656 has 8 divisors (see below), whose sum is σ = 249685174698120. Its totient is φ = 66582713252824.

The previous prime is 133165426505623. The next prime is 133165426505677. The reversal of 133165426505656 is 656505624561331.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 133165426505656.

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, 8322839156596 + ... + 8322839156611.

It is an arithmetic number, because the mean of its divisors is an integer number (31210646837265).

Almost surely, 2^{133165426505656} is an apocalyptic number.

It is an amenable number.

133165426505656 is a deficient number, since it is larger than the sum of its proper divisors (116519748192464).

133165426505656 is a wasteful number, since it uses less digits than its factorization.

133165426505656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16645678313213 (or 16645678313209 counting only the distinct ones).

The product of its (nonzero) digits is 58320000, while the sum is 58.

The spelling of 133165426505656 in words is "one hundred thirty-three trillion, one hundred sixty-five billion, four hundred twenty-six million, five hundred five thousand, six hundred fifty-six".