3811656945 has 64 divisors (see below), whose sum is σ = 6511104000. Its totient is φ = 1899912960.

The previous prime is 3811656917. The next prime is 3811656971. The reversal of 3811656945 is 5496561183.

It is not a de Polignac number, because 3811656945 - 2⁷ = 3811656817 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3811656894 and 3811656903.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4050175 + ... + 4051115.

It is an arithmetic number, because the mean of its divisors is an integer number (101736000).

Almost surely, 2^3811656945 is an apocalyptic number.

It is an amenable number.

3811656945 is a deficient number, since it is larger than the sum of its proper divisors (2699447055).

3811656945 is a wasteful number, since it uses less digits than its factorization.

3811656945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230.

The product of its digits is 777600, while the sum is 48.

The square root of 3811656945 is about 61738.6179388557. The cubic root of 3811656945 is about 1562.0847845620.

The spelling of 3811656945 in words is "three billion, eight hundred eleven million, six hundred fifty-six thousand, nine hundred forty-five".