102166809494 has 4 divisors (see below), whose sum is σ = 153250214244. Its totient is φ = 51083404746.

The previous prime is 102166809473. The next prime is 102166809527. The reversal of 102166809494 is 494908661201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 494908661201 = 61 ⋅8113256741.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25541702372 + ... + 25541702375.

It is an arithmetic number, because the mean of its divisors is an integer number (38312553561).

Almost surely, 2^102166809494 is an apocalyptic number.

102166809494 is a deficient number, since it is larger than the sum of its proper divisors (51083404750).

102166809494 is an equidigital number, since it uses as much as digits as its factorization.

102166809494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51083404749.

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 102166809494 in words is "one hundred two billion, one hundred sixty-six million, eight hundred nine thousand, four hundred ninety-four".