26949957599 has 16 divisors (see below), whose sum is σ = 29176277760. Its totient is φ = 24809400000.

The previous prime is 26949957493. The next prime is 26949957667. The reversal of 26949957599 is 99575994962.

It is a cyclic number.

It is not a de Polignac number, because 26949957599 - 2⁸ = 26949957343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26949957799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126614 + ... + 264444.

It is an arithmetic number, because the mean of its divisors is an integer number (1823517360).

Almost surely, 2^26949957599 is an apocalyptic number.

26949957599 is a deficient number, since it is larger than the sum of its proper divisors (2226320161).

26949957599 is a wasteful number, since it uses less digits than its factorization.

26949957599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138142.

The product of its digits is 496011600, while the sum is 74.

The spelling of 26949957599 in words is "twenty-six billion, nine hundred forty-nine million, nine hundred fifty-seven thousand, five hundred ninety-nine".