140757781329 has 27 divisors (see below), whose sum is σ = 223500103099. Its totient is φ = 85300242720.

The previous prime is 140757781319. The next prime is 140757781331. The reversal of 140757781329 is 923187757041.

The square root of 140757781329 is 375177.

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

140757781329 is a `hidden beast` number, since 1 + 40 + 7 + 577 + 8 + 1 + 3 + 29 = 666.

It can be written as a sum of positive squares in only one way, i.e., 81124141329 + 59633640000 = 284823^2 + 244200^2 .

It is not a de Polignac number, because 140757781329 - 2⁹ = 140757780817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140757781319) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12375157 + ... + 12386525.

Almost surely, 2^140757781329 is an apocalyptic number.

140757781329 is the 375177-th square number.

140757781329 is the 187589-th centered octagonal number.

It is an amenable number.

140757781329 is a deficient number, since it is larger than the sum of its proper divisors (82742321770).

140757781329 is an frugal number, since it uses more digits than its factorization.

140757781329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22766 (or 11383 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 54.

The spelling of 140757781329 in words is "one hundred forty billion, seven hundred fifty-seven million, seven hundred eighty-one thousand, three hundred twenty-nine".