31607417161 has 8 divisors (see below), whose sum is σ = 33477566760. Its totient is φ = 29738477568.

The previous prime is 31607417113. The next prime is 31607417189. The reversal of 31607417161 is 16171470613.

It can be written as a sum of positive squares in 4 ways, for example, as 8497336761 + 23110080400 = 92181^2 + 152020^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31607417161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31607417161.

It is not an unprimeable number, because it can be changed into a prime (31607417561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248436 + ... + 353461.

It is an arithmetic number, because the mean of its divisors is an integer number (4184695845).

Almost surely, 2^31607417161 is an apocalyptic number.

It is an amenable number.

31607417161 is a deficient number, since it is larger than the sum of its proper divisors (1870149599).

31607417161 is a wasteful number, since it uses less digits than its factorization.

31607417161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605003.

The product of its (nonzero) digits is 21168, while the sum is 37.

Adding to 31607417161 its reverse (16171470613), we get a palindrome (47778887774).

The spelling of 31607417161 in words is "thirty-one billion, six hundred seven million, four hundred seventeen thousand, one hundred sixty-one".