817894354106 has 4 divisors (see below), whose sum is σ = 1226841531162. Its totient is φ = 408947177052.

The previous prime is 817894354099. The next prime is 817894354127. The reversal of 817894354106 is 601453498718.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 812055101881 + 5839252225 = 901141^2 + 76415^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204473588525 + ... + 204473588528.

Almost surely, 2^817894354106 is an apocalyptic number.

817894354106 is a deficient number, since it is larger than the sum of its proper divisors (408947177056).

817894354106 is a wasteful number, since it uses less digits than its factorization.

817894354106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408947177055.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 817894354106 in words is "eight hundred seventeen billion, eight hundred ninety-four million, three hundred fifty-four thousand, one hundred six".