3781284438125 has 10 divisors (see below), whose sum is σ = 4725093034662. Its totient is φ = 3025027550000.

The previous prime is 3781284438121. The next prime is 3781284438149. The reversal of 3781284438125 is 5218344821873.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 936658131721 + 2844626306404 = 967811^2 + 1686602^2 .

It is not a de Polignac number, because 3781284438125 - 2² = 3781284438121 is a prime.

It is a super-2 number, since 2×3781284438125² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3781284438121) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3025026926 + ... + 3025028175.

Almost surely, 2^{3781284438125} is an apocalyptic number.

It is an amenable number.

3781284438125 is a deficient number, since it is larger than the sum of its proper divisors (943808596537).

3781284438125 is an frugal number, since it uses more digits than its factorization.

3781284438125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6050055121 (or 6050055106 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 56.

The spelling of 3781284438125 in words is "three trillion, seven hundred eighty-one billion, two hundred eighty-four million, four hundred thirty-eight thousand, one hundred twenty-five".