21549388848115 has 8 divisors (see below), whose sum is σ = 25871681064528. Its totient is φ = 17231234780640.

The previous prime is 21549388848083. The next prime is 21549388848173. The reversal of 21549388848115 is 51184888394512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21549388848115 - 2⁵ = 21549388848083 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1034525776 + ... + 1034546605.

It is an arithmetic number, because the mean of its divisors is an integer number (3233960133066).

Almost surely, 2^{21549388848115} is an apocalyptic number.

21549388848115 is a deficient number, since it is larger than the sum of its proper divisors (4322292216413).

21549388848115 is a wasteful number, since it uses less digits than its factorization.

21549388848115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069074469.

The product of its digits is 88473600, while the sum is 67.

The spelling of 21549388848115 in words is "twenty-one trillion, five hundred forty-nine billion, three hundred eighty-eight million, eight hundred forty-eight thousand, one hundred fifteen".