133865936331640 has 64 divisors (see below), whose sum is σ = 302443825413600. Its totient is φ = 53325327863808.

The previous prime is 133865936331613. The next prime is 133865936331649. The reversal of 133865936331640 is 46133639568331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133865936331649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5798932 + ... + 17359708.

Almost surely, 2^{133865936331640} is an apocalyptic number.

133865936331640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133865936331640 is an abundant number, since it is smaller than the sum of its proper divisors (168577889081960).

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

133865936331640 is a wasteful number, since it uses less digits than its factorization.

133865936331640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11561984 (or 11561980 counting only the distinct ones).

The product of its (nonzero) digits is 75582720, while the sum is 61.

The spelling of 133865936331640 in words is "one hundred thirty-three trillion, eight hundred sixty-five billion, nine hundred thirty-six million, three hundred thirty-one thousand, six hundred forty".