31757121089 has 8 divisors (see below), whose sum is σ = 33653468520. Its totient is φ = 29914192000.

The previous prime is 31757121059. The next prime is 31757121139. The reversal of 31757121089 is 98012175713.

It can be written as a sum of positive squares in 4 ways, for example, as 3821341489 + 27935779600 = 61817^2 + 167140^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31757121089 - 2⁸ = 31757120833 is a prime.

It is a super-2 number, since 2×31757121089² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31757121049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13353362 + ... + 13355739.

It is an arithmetic number, because the mean of its divisors is an integer number (4206683565).

Almost surely, 2^31757121089 is an apocalyptic number.

It is an amenable number.

31757121089 is a deficient number, since it is larger than the sum of its proper divisors (1896347431).

31757121089 is a wasteful number, since it uses less digits than its factorization.

31757121089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26709171.

The product of its (nonzero) digits is 105840, while the sum is 44.

The spelling of 31757121089 in words is "thirty-one billion, seven hundred fifty-seven million, one hundred twenty-one thousand, eighty-nine".