140766785721 has 9 divisors (see below), whose sum is σ = 203331427429. Its totient is φ = 93843773436.

The previous prime is 140766785711. The next prime is 140766785723. The reversal of 140766785721 is 127587667041.

The square root of 140766785721 is 375189.

It is a perfect power (a square), and thus also a powerful number.

140766785721 is a `hidden beast` number, since 1 + 4 + 0 + 7 + 6 + 67 + 8 + 572 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 140766785721 - 2¹⁵ = 140766752953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140766785723) 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 8 ways as a sum of consecutive naturals, for example, 1063036 + ... + 1188098.

Almost surely, 2^140766785721 is an apocalyptic number.

140766785721 is the 375189-th square number.

140766785721 is the 187595-th centered octagonal number.

It is an amenable number.

140766785721 is a deficient number, since it is larger than the sum of its proper divisors (62564641708).

140766785721 is an frugal number, since it uses more digits than its factorization.

140766785721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250132 (or 125066 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 54.

The spelling of 140766785721 in words is "one hundred forty billion, seven hundred sixty-six million, seven hundred eighty-five thousand, seven hundred twenty-one".