21772800015 has 8 divisors (see below), whose sum is σ = 34836480048. Its totient is φ = 11612160000.

The previous prime is 21772800001. The next prime is 21772800037. The reversal of 21772800015 is 51000827712.

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

It is not a de Polignac number, because 21772800015 - 2¹⁴ = 21772783631 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 725759986 + ... + 725760015.

It is an arithmetic number, because the mean of its divisors is an integer number (4354560006).

Almost surely, 2^21772800015 is an apocalyptic number.

21772800015 is a deficient number, since it is larger than the sum of its proper divisors (13063680033).

21772800015 is a wasteful number, since it uses less digits than its factorization.

21772800015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451520009.

The product of its (nonzero) digits is 7840, while the sum is 33.

The spelling of 21772800015 in words is "twenty-one billion, seven hundred seventy-two million, eight hundred thousand, fifteen".