31653116437 has 2 divisors, whose sum is σ = 31653116438. Its totient is φ = 31653116436.

The previous prime is 31653116431. The next prime is 31653116447. The reversal of 31653116437 is 73461135613.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21491266801 + 10161849636 = 146599^2 + 100806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31653116437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31653116437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31653116431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15826558218 + 15826558219.

It is an arithmetic number, because the mean of its divisors is an integer number (15826558219).

Almost surely, 2^31653116437 is an apocalyptic number.

It is an amenable number.

31653116437 is a deficient number, since it is larger than the sum of its proper divisors (1).

31653116437 is an equidigital number, since it uses as much as digits as its factorization.

31653116437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 40.

The spelling of 31653116437 in words is "thirty-one billion, six hundred fifty-three million, one hundred sixteen thousand, four hundred thirty-seven".