140316918921 has 15 divisors (see below), whose sum is σ = 209614260823. Its totient is φ = 93542365080.

The previous prime is 140316918901. The next prime is 140316918977. The reversal of 140316918921 is 129819613041.

The square root of 140316918921 is 374589.

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

140316918921 is a `hidden beast` number, since 1 + 403 + 1 + 69 + 189 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 58303414521 + 82013504400 = 241461^2 + 286380^2 .

It is not a de Polignac number, because 140316918921 - 2¹⁹ = 140316394633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140316918901) 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, 3350491 + ... + 3392111.

Almost surely, 2^140316918921 is an apocalyptic number.

140316918921 is the 374589-th square number.

140316918921 is the 187295-th centered octagonal number.

It is an amenable number.

140316918921 is a deficient number, since it is larger than the sum of its proper divisors (69297341902).

140316918921 is an frugal number, since it uses more digits than its factorization.

140316918921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83254 (or 41624 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 140316918921 in words is "one hundred forty billion, three hundred sixteen million, nine hundred eighteen thousand, nine hundred twenty-one".