3857212289281 has 16 divisors (see below), whose sum is σ = 4202590176400. Its totient is φ = 3518951724288.

The previous prime is 3857212289269. The next prime is 3857212289321. The reversal of 3857212289281 is 1829822127583.

It can be written as a sum of positive squares in 8 ways, for example, as 382809488656 + 3474402800625 = 618716^2 + 1863975^2 .

It is not a de Polignac number, because 3857212289281 - 2¹⁹ = 3857211764993 is a prime.

It is a super-2 number, since 2×3857212289281² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3857212289201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2865786 + ... + 3990883.

It is an arithmetic number, because the mean of its divisors is an integer number (262661886025).

Almost surely, 2^{3857212289281} is an apocalyptic number.

It is an amenable number.

3857212289281 is a deficient number, since it is larger than the sum of its proper divisors (345377887119).

3857212289281 is a wasteful number, since it uses less digits than its factorization.

3857212289281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6857188.

The product of its digits is 7741440, while the sum is 58.

The spelling of 3857212289281 in words is "three trillion, eight hundred fifty-seven billion, two hundred twelve million, two hundred eighty-nine thousand, two hundred eighty-one".