31610142749 has 2 divisors, whose sum is σ = 31610142750. Its totient is φ = 31610142748.

The previous prime is 31610142659. The next prime is 31610142793. The reversal of 31610142749 is 94724101613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20618088100 + 10992054649 = 143590^2 + 104843^2 .

It is a cyclic number.

It is not a de Polignac number, because 31610142749 - 2³² = 27315175453 is a prime.

It is a super-2 number, since 2×31610142749² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31610142799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15805071374 + 15805071375.

It is an arithmetic number, because the mean of its divisors is an integer number (15805071375).

Almost surely, 2^31610142749 is an apocalyptic number.

It is an amenable number.

31610142749 is a deficient number, since it is larger than the sum of its proper divisors (1).

31610142749 is an equidigital number, since it uses as much as digits as its factorization.

31610142749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 31610142749 in words is "thirty-one billion, six hundred ten million, one hundred forty-two thousand, seven hundred forty-nine".