385437315869 has 2 divisors, whose sum is σ = 385437315870. Its totient is φ = 385437315868.

The previous prime is 385437315859. The next prime is 385437315953. The reversal of 385437315869 is 968513734583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377770036900 + 7667278969 = 614630^2 + 87563^2 .

It is an emirp because it is prime and its reverse (968513734583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385437315869 - 2²⁸ = 385168880413 is a prime.

It is a super-2 number, since 2×385437315869² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385437315859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192718657934 + 192718657935.

It is an arithmetic number, because the mean of its divisors is an integer number (192718657935).

Almost surely, 2^385437315869 is an apocalyptic number.

It is an amenable number.

385437315869 is a deficient number, since it is larger than the sum of its proper divisors (1).

385437315869 is an equidigital number, since it uses as much as digits as its factorization.

385437315869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65318400, while the sum is 62.

The spelling of 385437315869 in words is "three hundred eighty-five billion, four hundred thirty-seven million, three hundred fifteen thousand, eight hundred sixty-nine".