806813443774 has 24 divisors (see below), whose sum is σ = 1320793862400. Its totient is φ = 369443325888.

The previous prime is 806813443771. The next prime is 806813443823. The reversal of 806813443774 is 477344318608.

It is a happy number.

It is a super-2 number, since 2×806813443774² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806813443771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9354799 + ... + 9440650.

It is an arithmetic number, because the mean of its divisors is an integer number (55033077600).

Almost surely, 2^806813443774 is an apocalyptic number.

806813443774 is a deficient number, since it is larger than the sum of its proper divisors (513980418626).

806813443774 is a wasteful number, since it uses less digits than its factorization.

806813443774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18795604 (or 18795591 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 55.

The spelling of 806813443774 in words is "eight hundred six billion, eight hundred thirteen million, four hundred forty-three thousand, seven hundred seventy-four".