385809609637 has 2 divisors, whose sum is σ = 385809609638. Its totient is φ = 385809609636.

The previous prime is 385809609617. The next prime is 385809609659. The reversal of 385809609637 is 736906908583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325172517121 + 60637092516 = 570239^2 + 246246^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385809609637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385809609617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192904804818 + 192904804819.

It is an arithmetic number, because the mean of its divisors is an integer number (192904804819).

Almost surely, 2^385809609637 is an apocalyptic number.

It is an amenable number.

385809609637 is a deficient number, since it is larger than the sum of its proper divisors (1).

385809609637 is an equidigital number, since it uses as much as digits as its factorization.

385809609637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58786560, while the sum is 64.

The spelling of 385809609637 in words is "three hundred eighty-five billion, eight hundred nine million, six hundred nine thousand, six hundred thirty-seven".