21080250777599 has 32 divisors (see below), whose sum is σ = 23281922664000. Its totient is φ = 18967715389440.

The previous prime is 21080250777587. The next prime is 21080250777637. The reversal of 21080250777599 is 99577705208012.

It is a cyclic number.

It is not a de Polignac number, because 21080250777599 - 2¹² = 21080250773503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21080250777199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42824627 + ... + 43314075.

It is an arithmetic number, because the mean of its divisors is an integer number (727560083250).

Almost surely, 2^{21080250777599} is an apocalyptic number.

21080250777599 is a deficient number, since it is larger than the sum of its proper divisors (2201671886401).

21080250777599 is a wasteful number, since it uses less digits than its factorization.

21080250777599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489995.

The product of its (nonzero) digits is 22226400, while the sum is 62.

The spelling of 21080250777599 in words is "twenty-one trillion, eighty billion, two hundred fifty million, seven hundred seventy-seven thousand, five hundred ninety-nine".