133810785640 has 96 divisors (see below), whose sum is σ = 359695100520. Its totient is φ = 44638013952.

The previous prime is 133810785637. The next prime is 133810785673. The reversal of 133810785640 is 46587018331.

It can be written as a sum of positive squares in 4 ways, for example, as 125785134244 + 8025651396 = 354662^2 + 89586^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 850059 + ... + 995098.

Almost surely, 2^133810785640 is an apocalyptic number.

133810785640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133810785640 is an abundant number, since it is smaller than the sum of its proper divisors (225884314880).

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

133810785640 is a wasteful number, since it uses less digits than its factorization.

133810785640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845219 (or 1845208 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 133810785640 in words is "one hundred thirty-three billion, eight hundred ten million, seven hundred eighty-five thousand, six hundred forty".