16860990826 has 4 divisors (see below), whose sum is σ = 25291486242. Its totient is φ = 8430495412.

The previous prime is 16860990767. The next prime is 16860990827. The reversal of 16860990826 is 62809906861.

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., 13328471601 + 3532519225 = 115449^2 + 59435^2 .

It is not an unprimeable number, because it can be changed into a prime (16860990827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4215247705 + ... + 4215247708.

Almost surely, 2^16860990826 is an apocalyptic number.

16860990826 is a deficient number, since it is larger than the sum of its proper divisors (8430495416).

16860990826 is an equidigital number, since it uses as much as digits as its factorization.

16860990826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8430495415.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 16860990826 in words is "sixteen billion, eight hundred sixty million, nine hundred ninety thousand, eight hundred twenty-six".