23528798881 has 27 divisors (see below), whose sum is σ = 29097529689. Its totient is φ = 18966490368.

The previous prime is 23528798869. The next prime is 23528798899. The reversal of 23528798881 is 18889782532.

The square root of 23528798881 is 153391.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 8198397025 + 15330401856 = 90545^2 + 123816^2 .

It is not a de Polignac number, because 23528798881 - 2¹⁷ = 23528667809 is a prime.

It is a super-2 number, since 2×23528798881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23528798801) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 18252885 + ... + 18254173.

Almost surely, 2^23528798881 is an apocalyptic number.

23528798881 is the 153391-st square number.

23528798881 is the 76696-th centered octagonal number.

It is an amenable number.

23528798881 is a deficient number, since it is larger than the sum of its proper divisors (5568730808).

23528798881 is an frugal number, since it uses more digits than its factorization.

23528798881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626 (or 1313 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 61.

The spelling of 23528798881 in words is "twenty-three billion, five hundred twenty-eight million, seven hundred ninety-eight thousand, eight hundred eighty-one".