31161480061 has 4 divisors (see below), whose sum is σ = 31689640800. Its totient is φ = 30633319324.

The previous prime is 31161480047. The next prime is 31161480079. The reversal of 31161480061 is 16008416113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31161480061 - 2¹¹ = 31161478013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31161480001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264080281 + ... + 264080398.

It is an arithmetic number, because the mean of its divisors is an integer number (7922410200).

Almost surely, 2^31161480061 is an apocalyptic number.

It is an amenable number.

31161480061 is a deficient number, since it is larger than the sum of its proper divisors (528160739).

31161480061 is an equidigital number, since it uses as much as digits as its factorization.

31161480061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528160738.

The product of its (nonzero) digits is 3456, while the sum is 31.

Adding to 31161480061 its reverse (16008416113), we get a palindrome (47169896174).

The spelling of 31161480061 in words is "thirty-one billion, one hundred sixty-one million, four hundred eighty thousand, sixty-one".