26016391998 has 32 divisors (see below), whose sum is σ = 58510771200. Its totient is φ = 8567645688.

The previous prime is 26016391967. The next prime is 26016392009. The reversal of 26016391998 is 89919361062.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 2897838 + ... + 2906801.

It is an arithmetic number, because the mean of its divisors is an integer number (1828461600).

Almost surely, 2^26016391998 is an apocalyptic number.

26016391998 is an abundant number, since it is smaller than the sum of its proper divisors (32494379202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26016391998 is a wasteful number, since it uses less digits than its factorization.

26016391998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5804733 (or 5804727 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The spelling of 26016391998 in words is "twenty-six billion, sixteen million, three hundred ninety-one thousand, nine hundred ninety-eight".