140838257785581 has 12 divisors (see below), whose sum is σ = 203433910657120. Its totient is φ = 93891769564680.

The previous prime is 140838257785573. The next prime is 140838257785627. The reversal of 140838257785581 is 185587752838041.

140838257785581 is a `hidden beast` number, since 1 + 4 + 0 + 8 + 38 + 2 + 5 + 7 + 7 + 8 + 5 + 581 = 666.

It is not a de Polignac number, because 140838257785581 - 2³ = 140838257785573 is a prime.

It is a super-2 number, since 2×140838257785581² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140838257781581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31299361 + ... + 35515158.

Almost surely, 2^{140838257785581} is an apocalyptic number.

It is an amenable number.

140838257785581 is a deficient number, since it is larger than the sum of its proper divisors (62595652871539).

140838257785581 is a wasteful number, since it uses less digits than its factorization.

140838257785581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67048736 (or 67048733 counting only the distinct ones).

The product of its (nonzero) digits is 602112000, while the sum is 72.

The spelling of 140838257785581 in words is "one hundred forty trillion, eight hundred thirty-eight billion, two hundred fifty-seven million, seven hundred eighty-five thousand, five hundred eighty-one".