31640658750009 has 27 divisors (see below), whose sum is σ = 45773995181317. Its totient is φ = 21061136232600.

The previous prime is 31640658749977. The next prime is 31640658750023. The reversal of 31640658750009 is 90005785604613.

The square root of 31640658750009 is 5625003.

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

31640658750009 is a `hidden beast` number, since 3 + 1 + 6 + 4 + 0 + 6 + 587 + 50 + 0 + 0 + 9 = 666.

It is not a de Polignac number, because 31640658750009 - 2⁵ = 31640658749977 is a prime.

It is a super-2 number, since 2×31640658750009² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31640658750059) 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, 16385632774 + ... + 16385634704.

Almost surely, 2^{31640658750009} is an apocalyptic number.

31640658750009 is the 5625003-rd square number.

31640658750009 is the 2812502-nd centered octagonal number.

It is an amenable number.

31640658750009 is a deficient number, since it is larger than the sum of its proper divisors (14133336431308).

31640658750009 is an frugal number, since it uses more digits than its factorization.

31640658750009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5810 (or 2905 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 54.

The spelling of 31640658750009 in words is "thirty-one trillion, six hundred forty billion, six hundred fifty-eight million, seven hundred fifty thousand, nine".