21770559441 has 48 divisors (see below), whose sum is σ = 33189631488. Its totient is φ = 13733280000.

The previous prime is 21770559407. The next prime is 21770559457. The reversal of 21770559441 is 14495507712.

21770559441 is a `hidden beast` number, since 2 + 17 + 7 + 0 + 5 + 594 + 41 = 666.

It is not a de Polignac number, because 21770559441 - 2⁷ = 21770559313 is a prime.

It is a super-2 number, since 2×21770559441² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21770559491) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2556691 + ... + 2565191.

It is an arithmetic number, because the mean of its divisors is an integer number (691450656).

Almost surely, 2^21770559441 is an apocalyptic number.

It is an amenable number.

21770559441 is a deficient number, since it is larger than the sum of its proper divisors (11419072047).

21770559441 is a wasteful number, since it uses less digits than its factorization.

21770559441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8742 (or 8739 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The spelling of 21770559441 in words is "twenty-one billion, seven hundred seventy million, five hundred fifty-nine thousand, four hundred forty-one".