537421631693 has 2 divisors, whose sum is σ = 537421631694. Its totient is φ = 537421631692.

The previous prime is 537421631689. The next prime is 537421631713. The reversal of 537421631693 is 396136124735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 536639758249 + 781873444 = 732557^2 + 27962^2 .

It is a cyclic number.

It is not a de Polignac number, because 537421631693 - 2² = 537421631689 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (537421631093) 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, 268710815846 + 268710815847.

It is an arithmetic number, because the mean of its divisors is an integer number (268710815847).

Almost surely, 2^537421631693 is an apocalyptic number.

It is an amenable number.

537421631693 is a deficient number, since it is larger than the sum of its proper divisors (1).

537421631693 is an equidigital number, since it uses as much as digits as its factorization.

537421631693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 50.

The spelling of 537421631693 in words is "five hundred thirty-seven billion, four hundred twenty-one million, six hundred thirty-one thousand, six hundred ninety-three".