133999761240 has 80 divisors (see below), whose sum is σ = 450388097280. Its totient is φ = 35733268800.

The previous prime is 133999761229. The next prime is 133999761241. The reversal of 133999761240 is 42167999331.

It is a happy number.

133999761240 is a `hidden beast` number, since 1 + 3 + 399 + 9 + 7 + 6 + 1 + 240 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133999761241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20675736 + ... + 20682215.

It is an arithmetic number, because the mean of its divisors is an integer number (5629851216).

Almost surely, 2^133999761240 is an apocalyptic number.

133999761240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133999761240 is an abundant number, since it is smaller than the sum of its proper divisors (316388336040).

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

133999761240 is a wasteful number, since it uses less digits than its factorization.

133999761240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41357974 (or 41357961 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The spelling of 133999761240 in words is "one hundred thirty-three billion, nine hundred ninety-nine million, seven hundred sixty-one thousand, two hundred forty".