31123046661 has 32 divisors (see below), whose sum is σ = 47560181760. Its totient is φ = 17734216896.

The previous prime is 31123046641. The next prime is 31123046681. The reversal of 31123046661 is 16664032113.

It is an interprime number because it is at equal distance from previous prime (31123046641) and next prime (31123046681).

It is not a de Polignac number, because 31123046661 - 2¹¹ = 31123044613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123046641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16319470 + ... + 16321376.

It is an arithmetic number, because the mean of its divisors is an integer number (1486255680).

Almost surely, 2^31123046661 is an apocalyptic number.

It is an amenable number.

31123046661 is a deficient number, since it is larger than the sum of its proper divisors (16437135099).

31123046661 is a wasteful number, since it uses less digits than its factorization.

31123046661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3713.

The product of its (nonzero) digits is 15552, while the sum is 33.

Adding to 31123046661 its reverse (16664032113), we get a palindrome (47787078774).

The spelling of 31123046661 in words is "thirty-one billion, one hundred twenty-three million, forty-six thousand, six hundred sixty-one".