3213686845 has 16 divisors (see below), whose sum is σ = 4080782592. Its totient is φ = 2424526720.

The previous prime is 3213686821. The next prime is 3213686857. The reversal of 3213686845 is 5486863123.

It is not a de Polignac number, because 3213686845 - 2⁷ = 3213686717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3213686795 and 3213686804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188632 + ... + 204961.

It is an arithmetic number, because the mean of its divisors is an integer number (255048912).

Almost surely, 2^3213686845 is an apocalyptic number.

It is an amenable number.

3213686845 is a deficient number, since it is larger than the sum of its proper divisors (867095747).

3213686845 is a wasteful number, since it uses less digits than its factorization.

3213686845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393692.

The product of its digits is 829440, while the sum is 46.

The square root of 3213686845 is about 56689.3891746948. The cubic root of 3213686845 is about 1475.7105598743.

The spelling of 3213686845 in words is "three billion, two hundred thirteen million, six hundred eighty-six thousand, eight hundred forty-five".