3774943906781 has 8 divisors (see below), whose sum is σ = 3939104338560. Its totient is φ = 3610786178032.

The previous prime is 3774943906771. The next prime is 3774943906817. The reversal of 3774943906781 is 1876093494773.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3774943906781 - 2³⁰ = 3773870164957 is a prime.

It is a super-2 number, since 2×3774943906781² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3774943906771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2494616 + ... + 3711198.

It is an arithmetic number, because the mean of its divisors is an integer number (492388042320).

Almost surely, 2^{3774943906781} is an apocalyptic number.

It is an amenable number.

3774943906781 is a deficient number, since it is larger than the sum of its proper divisors (164160431779).

3774943906781 is a wasteful number, since it uses less digits than its factorization.

3774943906781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351515.

The product of its (nonzero) digits is 192036096, while the sum is 68.

The spelling of 3774943906781 in words is "three trillion, seven hundred seventy-four billion, nine hundred forty-three million, nine hundred six thousand, seven hundred eighty-one".