444493397666537 has 2 divisors, whose sum is σ = 444493397666538. Its totient is φ = 444493397666536.

The previous prime is 444493397666533. The next prime is 444493397666687. The reversal of 444493397666537 is 735666793394444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234383270395561 + 210110127270976 = 15309581^2 + 14495176^2 .

It is a cyclic number.

It is not a de Polignac number, because 444493397666537 - 2² = 444493397666533 is a prime.

It is a super-3 number, since 3×444493397666537³ (a number of 45 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (444493397666531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222246698833268 + 222246698833269.

It is an arithmetic number, because the mean of its divisors is an integer number (222246698833269).

Almost surely, 2^{444493397666537} is an apocalyptic number.

It is an amenable number.

444493397666537 is a deficient number, since it is larger than the sum of its proper divisors (1).

444493397666537 is an equidigital number, since it uses as much as digits as its factorization.

444493397666537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29628426240, while the sum is 80.

The spelling of 444493397666537 in words is "four hundred forty-four trillion, four hundred ninety-three billion, three hundred ninety-seven million, six hundred sixty-six thousand, five hundred thirty-seven".