21610489488 has 160 divisors (see below), whose sum is σ = 67630742784. Its totient is φ = 5804752896.

The previous prime is 21610489487. The next prime is 21610489493. The reversal of 21610489488 is 88498401612.

It is a super-5 number, since 5×21610489488⁵ (a number of 53 digits) contains 55555 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21610489488.

It is not an unprimeable number, because it can be changed into a prime (21610489487) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 7407006 + ... + 7409922.

Almost surely, 2^21610489488 is an apocalyptic number.

21610489488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21610489488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33815371392).

21610489488 is an abundant number, since it is smaller than the sum of its proper divisors (46020253296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21610489488 is a wasteful number, since it uses less digits than its factorization.

21610489488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4249 (or 4243 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 51.

The spelling of 21610489488 in words is "twenty-one billion, six hundred ten million, four hundred eighty-nine thousand, four hundred eighty-eight".