21772532859 has 128 divisors (see below), whose sum is σ = 39402381312. Its totient is φ = 10349475840.

The previous prime is 21772532857. The next prime is 21772532911. The reversal of 21772532859 is 95823527712.

It is not a de Polignac number, because 21772532859 - 2¹ = 21772532857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (21772532857) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 21837549 + ... + 21838545.

It is an arithmetic number, because the mean of its divisors is an integer number (307831104).

Almost surely, 2^21772532859 is an apocalyptic number.

21772532859 is a deficient number, since it is larger than the sum of its proper divisors (17629848453).

21772532859 is a wasteful number, since it uses less digits than its factorization.

21772532859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185.

The product of its digits is 2116800, while the sum is 51.

The spelling of 21772532859 in words is "twenty-one billion, seven hundred seventy-two million, five hundred thirty-two thousand, eight hundred fifty-nine".