3781685142941 has 4 divisors (see below), whose sum is σ = 3781752024384. Its totient is φ = 3781618261500.

The previous prime is 3781685142929. The next prime is 3781685143003. The reversal of 3781685142941 is 1492415861873.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3781685142941 is a prime.

It is a super-2 number, since 2×3781685142941² (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 (3781685145941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33355835 + ... + 33469016.

It is an arithmetic number, because the mean of its divisors is an integer number (945438006096).

Almost surely, 2^{3781685142941} is an apocalyptic number.

It is an amenable number.

3781685142941 is a deficient number, since it is larger than the sum of its proper divisors (66881443).

3781685142941 is an equidigital number, since it uses as much as digits as its factorization.

3781685142941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66881442.

The product of its digits is 11612160, while the sum is 59.

The spelling of 3781685142941 in words is "three trillion, seven hundred eighty-one billion, six hundred eighty-five million, one hundred forty-two thousand, nine hundred forty-one".