31143060649 has 2 divisors, whose sum is σ = 31143060650. Its totient is φ = 31143060648.

The previous prime is 31143060593. The next prime is 31143060659. The reversal of 31143060649 is 94606034113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26451769600 + 4691291049 = 162640^2 + 68493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31143060649 is a prime.

It is not a weakly prime, because it can be changed into another prime (31143060659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571530324 + 15571530325.

It is an arithmetic number, because the mean of its divisors is an integer number (15571530325).

Almost surely, 2^31143060649 is an apocalyptic number.

It is an amenable number.

31143060649 is a deficient number, since it is larger than the sum of its proper divisors (1).

31143060649 is an equidigital number, since it uses as much as digits as its factorization.

31143060649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 37.

The spelling of 31143060649 in words is "thirty-one billion, one hundred forty-three million, sixty thousand, six hundred forty-nine".