133307765646 has 32 divisors (see below), whose sum is σ = 291098510208. Its totient is φ = 40362236640.

The previous prime is 133307765623. The next prime is 133307765651. The reversal of 133307765646 is 646567703331.

It is a congruent 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, 772465 + ... + 929148.

It is an arithmetic number, because the mean of its divisors is an integer number (9096828444).

Almost surely, 2^133307765646 is an apocalyptic number.

133307765646 is an abundant number, since it is smaller than the sum of its proper divisors (157790744562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133307765646 is a wasteful number, since it uses less digits than its factorization.

133307765646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702816.

The product of its (nonzero) digits is 5715360, while the sum is 51.

The spelling of 133307765646 in words is "one hundred thirty-three billion, three hundred seven million, seven hundred sixty-five thousand, six hundred forty-six".