140670753721 has 15 divisors (see below), whose sum is σ = 147272574351. Its totient is φ = 134364853128.

The previous prime is 140670753679. The next prime is 140670753749. The reversal of 140670753721 is 127357076041.

It is a happy number.

The square root of 140670753721 is 375061.

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

It can be written as a sum of positive squares in only one way, i.e., 18772014121 + 121898739600 = 137011^2 + 349140^2 .

It is a de Polignac number, because none of the positive numbers 2^k-140670753721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140670750721) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 198406915 + ... + 198407623.

Almost surely, 2^140670753721 is an apocalyptic number.

140670753721 is the 375061-st square number.

140670753721 is the 187531-st centered octagonal number.

It is an amenable number.

140670753721 is a deficient number, since it is larger than the sum of its proper divisors (6601820630).

140670753721 is an frugal number, since it uses more digits than its factorization.

140670753721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 43.

The spelling of 140670753721 in words is "one hundred forty billion, six hundred seventy million, seven hundred fifty-three thousand, seven hundred twenty-one".