385724946281 has 2 divisors, whose sum is σ = 385724946282. Its totient is φ = 385724946280.

The previous prime is 385724946199. The next prime is 385724946283. The reversal of 385724946281 is 182649427583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252164665600 + 133560280681 = 502160^2 + 365459^2 .

It is a cyclic number.

It is not a de Polignac number, because 385724946281 - 2¹⁰ = 385724945257 is a prime.

It is a super-2 number, since 2×385724946281² (a number of 24 digits) contains 22 as substring.

Together with 385724946283, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 385724946281.

It is not a weakly prime, because it can be changed into another prime (385724946283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192862473140 + 192862473141.

It is an arithmetic number, because the mean of its divisors is an integer number (192862473141).

Almost surely, 2^385724946281 is an apocalyptic number.

It is an amenable number.

385724946281 is a deficient number, since it is larger than the sum of its proper divisors (1).

385724946281 is an equidigital number, since it uses as much as digits as its factorization.

385724946281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23224320, while the sum is 59.

The spelling of 385724946281 in words is "three hundred eighty-five billion, seven hundred twenty-four million, nine hundred forty-six thousand, two hundred eighty-one".